diff --git a/AudioUnit/AmuseContainer.entitlements.in b/AudioUnit/AmuseContainer.entitlements.in
index 44210a9..a0c9333 100644
--- a/AudioUnit/AmuseContainer.entitlements.in
+++ b/AudioUnit/AmuseContainer.entitlements.in
@@ -6,6 +6,10 @@
   <string>@APPLE_TEAM_ID@.@APPLE_BUNDLE_ID@</string>
   <key>com.apple.developer.team-identifier</key>
   <string>@APPLE_TEAM_ID@</string>
+  <key>com.apple.security.app-sandbox</key>
+  <true/>
+  <key>com.apple.security.files.user-selected.read-only</key>
+  <true/>
   <key>com.apple.security.application-groups</key>
   <array>
     <string>group.io.github.axiodl.Amuse.AudioGroups</string>
diff --git a/AudioUnit/AmuseContainerMainMenu.xib b/AudioUnit/AmuseContainerMainMenu.xib
index 380a37b..64c767c 100644
--- a/AudioUnit/AmuseContainerMainMenu.xib
+++ b/AudioUnit/AmuseContainerMainMenu.xib
@@ -91,11 +91,6 @@ CA
                                     <action selector="removeDataItem:" target="Y3H-Qy-a7C" id="aAl-Ko-LrT"/>
                                 </connections>
                             </menuItem>
-                            <menuItem title="Select All" keyEquivalent="a" id="Ruw-6m-B2m">
-                                <connections>
-                                    <action selector="selectAll:" target="-1" id="VNm-Mi-diN"/>
-                                </connections>
-                            </menuItem>
                         </items>
                     </menu>
                 </menuItem>
@@ -195,9 +190,9 @@ CA
                                                 <action selector="removeDataItem:" target="Y3H-Qy-a7C" id="hau-zt-Ozz"/>
                                             </connections>
                                         </button>
-                                        <button verticalHuggingPriority="750" translatesAutoresizingMaskIntoConstraints="NO" id="mpK-AK-Otf">
+                                        <button verticalHuggingPriority="750" translatesAutoresizingMaskIntoConstraints="NO" id="mpK-AK-Otf" customClass="InactiveButton">
                                             <rect key="frame" x="58" y="-1" width="486" height="32"/>
-                                            <buttonCell key="cell" type="smallSquare" bezelStyle="smallSquare" imagePosition="overlaps" alignment="center" lineBreakMode="truncatingTail" refusesFirstResponder="YES" state="on" borderStyle="border" imageScaling="proportionallyDown" inset="2" id="JwG-gw-HOj">
+                                            <buttonCell key="cell" type="smallSquare" bezelStyle="smallSquare" imagePosition="overlaps" alignment="center" lineBreakMode="truncatingTail" state="on" borderStyle="border" imageScaling="proportionallyDown" inset="2" id="JwG-gw-HOj">
                                                 <behavior key="behavior" pushIn="YES" lightByBackground="YES" lightByGray="YES"/>
                                                 <font key="font" metaFont="system"/>
                                             </buttonCell>
@@ -215,7 +210,7 @@ CA
                                                         <color key="backgroundColor" name="_sourceListBackgroundColor" catalog="System" colorSpace="catalog"/>
                                                         <color key="gridColor" name="gridColor" catalog="System" colorSpace="catalog"/>
                                                         <tableColumns>
-                                                            <tableColumn identifier="CollectionColumn" width="193" minWidth="100" maxWidth="1000" id="DlG-iE-h1a">
+                                                            <tableColumn identifier="CollectionColumn" width="300" minWidth="100" maxWidth="1000" id="DlG-iE-h1a">
                                                                 <tableHeaderCell key="headerCell" lineBreakMode="truncatingTail" borderStyle="border" title="Collection">
                                                                     <font key="font" metaFont="smallSystem"/>
                                                                     <color key="textColor" name="headerTextColor" catalog="System" colorSpace="catalog"/>
@@ -227,7 +222,7 @@ CA
                                                                 </buttonCell>
                                                                 <tableColumnResizingMask key="resizingMask" resizeWithTable="YES" userResizable="YES"/>
                                                             </tableColumn>
-                                                            <tableColumn identifier="DetailsColumn" width="343" minWidth="40" maxWidth="1000" id="alh-ut-BoX">
+                                                            <tableColumn identifier="DetailsColumn" width="236" minWidth="40" maxWidth="1000" id="alh-ut-BoX">
                                                                 <tableHeaderCell key="headerCell" lineBreakMode="truncatingTail" borderStyle="border" title="Details">
                                                                     <font key="font" metaFont="smallSystem"/>
                                                                     <color key="textColor" name="headerTextColor" catalog="System" colorSpace="catalog"/>
@@ -258,8 +253,8 @@ CA
                                                 <autoresizingMask key="autoresizingMask"/>
                                             </tableHeaderView>
                                         </scrollView>
-                                        <searchField wantsLayer="YES" verticalHuggingPriority="750" translatesAutoresizingMaskIntoConstraints="NO" id="Huk-pR-ayq">
-                                            <rect key="frame" x="65" y="4" width="474" height="22"/>
+                                        <searchField wantsLayer="YES" verticalHuggingPriority="750" misplaced="YES" translatesAutoresizingMaskIntoConstraints="NO" id="Huk-pR-ayq">
+                                            <rect key="frame" x="64" y="3" width="476" height="22"/>
                                             <constraints>
                                                 <constraint firstAttribute="height" constant="22" id="uJy-eO-Y8o"/>
                                             </constraints>
diff --git a/AudioUnit/AmuseContainingApp.mm b/AudioUnit/AmuseContainingApp.mm
index a0bc142..76236c2 100644
--- a/AudioUnit/AmuseContainingApp.mm
+++ b/AudioUnit/AmuseContainingApp.mm
@@ -9,6 +9,13 @@
 @class SamplesTableController;
 @class SFXTableController;
 
+/* Blocks mousedown events */
+@interface InactiveButton : NSButton {}
+@end
+@implementation InactiveButton
+- (void)mouseDown:(NSEvent *)theEvent {}
+@end
+
 @interface MainView : NSView
 {
     AudioUnitViewController* amuseVC;
@@ -36,17 +43,18 @@
 
 
 @implementation DataOutlineView
+- (id)initWithCoder:(NSCoder *)coder
+{
+    self = [super initWithCoder:coder];
+    [self registerForDraggedTypes:@[NSURLPboardType]];
+    return self;
+}
 - (id)initWithFrame:(NSRect)frameRect
 {
     self = [super initWithFrame:frameRect];
-    [self registerForDraggedTypes:@[(__bridge NSString*)kUTTypeData]];
+    [self registerForDraggedTypes:@[NSURLPboardType]];
     return self;
 }
-
-- (BOOL)performDragOperation:(id<NSDraggingInfo>)sender
-{
-    return NO;
-}
 @end
 
 @interface MainTabView : NSTabView
@@ -107,7 +115,7 @@
 
 @implementation AppDelegate
 
-- (void)applicationDidFinishLaunching:(NSNotification*)notification
+- (void)applicationWillFinishLaunching:(NSNotification*)notification
 {
     [[NSUserDefaults standardUserDefaults] setBool:NO forKey:@"NSConstraintBasedLayoutVisualizeMutuallyExclusiveConstraints"];
     [mainWindow.toolbar setSelectedItemIdentifier:@"DataTab"];
@@ -150,6 +158,8 @@
     }
     
     std::string name(amuse::ContainerRegistry::TypeToName(containerType));
+    if (containerType == amuse::ContainerRegistry::Type::Raw4)
+        name = url.URLByDeletingPathExtension.lastPathComponent.UTF8String;
     return [groupFilePresenter addCollectionName:std::move(name) items:std::move(data)];
 }
 
@@ -188,6 +198,12 @@
     }
 }
 
+- (BOOL)application:(NSApplication *)sender openFile:(NSString *)filename
+{
+    NSURL* url = [NSURL fileURLWithPath:filename isDirectory:NO];
+    return [self importURL:url];
+}
+
 @end
 
 int main(int argc, const char * argv[])
diff --git a/AudioUnit/AudioGroupFilePresenter.hpp b/AudioUnit/AudioGroupFilePresenter.hpp
index e134343..f5e249c 100644
--- a/AudioUnit/AudioGroupFilePresenter.hpp
+++ b/AudioUnit/AudioGroupFilePresenter.hpp
@@ -37,7 +37,7 @@ struct AudioGroupDataCollection
         MetaData(amuse::DataFormat fmtIn, uint32_t absOffsIn, uint32_t activeIn)
         : fmt(fmtIn), absOffs(absOffsIn), active(activeIn) {}
         MetaData(athena::io::FileReader& r)
-        : fmt(amuse::DataFormat(r.readUint32Big())), absOffs(r.readUint32Big()), active(r.readUint32Big()) {}
+        : fmt(amuse::DataFormat(r.readUint32Little())), absOffs(r.readUint32Little()), active(r.readUint32Little()) {}
     };
     std::experimental::optional<MetaData> m_metaData;
     
@@ -60,34 +60,6 @@ struct AudioGroupDataCollection
     void disable(AudioGroupFilePresenter* presenter);
 };
 
-template <class T>
-class IteratorTracker
-{
-    typename std::map<std::string, T>::const_iterator m_audioGroupOutlineBegin;
-    typename std::map<std::string, T>::const_iterator m_audioGroupOutlineEnd;
-    typename std::map<std::string, T>::const_iterator m_audioGroupOutlineIt;
-    size_t m_audioGroupOutlineIdx = 0;
-    
-public:
-    IteratorTracker(typename std::map<std::string, T>::const_iterator begin,
-                    typename std::map<std::string, T>::const_iterator end)
-    : m_audioGroupOutlineBegin(begin), m_audioGroupOutlineEnd(end), m_audioGroupOutlineIt(begin) {}
-    typename std::map<std::string, T>::const_iterator seekToIndex(size_t idx)
-    {
-        if (idx == m_audioGroupOutlineIdx)
-            return m_audioGroupOutlineIt;
-        if (idx < m_audioGroupOutlineIdx)
-        {
-            for (; idx < m_audioGroupOutlineIdx && m_audioGroupOutlineIt != m_audioGroupOutlineBegin ;
-                 --m_audioGroupOutlineIdx, --m_audioGroupOutlineIt) {}
-            return m_audioGroupOutlineIt;
-        }
-        for (; idx > m_audioGroupOutlineIdx && m_audioGroupOutlineIt != m_audioGroupOutlineEnd ;
-             ++m_audioGroupOutlineIdx, ++m_audioGroupOutlineIt) {}
-        return m_audioGroupOutlineIt;
-    }
-};
-
 struct AudioGroupCollection
 {
     NSURL* m_url;
@@ -95,7 +67,6 @@ struct AudioGroupCollection
     AudioGroupCollectionToken* m_token;
     std::map<std::string, std::unique_ptr<AudioGroupDataCollection>> m_groups;
     std::vector<std::map<std::string, std::unique_ptr<AudioGroupDataCollection>>::iterator> m_filterGroups;
-    //std::experimental::optional<IteratorTracker<std::unique_ptr<AudioGroupDataCollection>>> m_iteratorTracker;
     
     AudioGroupCollection(NSURL* url);
     void addCollection(std::vector<std::pair<std::string, amuse::IntrusiveAudioGroupData>>&& collection);
@@ -127,8 +98,6 @@ struct AudioGroupCollection
     std::vector<std::map<std::string, std::unique_ptr<AudioGroupCollection>>::iterator> m_filterAudioGroupCollections;
     NSOutlineView* lastOutlineView;
     NSString* searchStr;
-    
-    //std::experimental::optional<IteratorTracker<std::unique_ptr<AudioGroupCollection>>> m_iteratorTracker;
 }
 - (BOOL)addCollectionName:(std::string&&)name items:(std::vector<std::pair<std::string, amuse::IntrusiveAudioGroupData>>&&)collection;
 - (void)update;
diff --git a/AudioUnit/AudioGroupFilePresenter.mm b/AudioUnit/AudioGroupFilePresenter.mm
index 5e7a60a..61cdf2a 100644
--- a/AudioUnit/AudioGroupFilePresenter.mm
+++ b/AudioUnit/AudioGroupFilePresenter.mm
@@ -137,7 +137,7 @@ AudioGroupDataCollection::AudioGroupDataCollection(const std::string& name, NSUR
 
 bool AudioGroupDataCollection::_attemptLoad(AudioGroupFilePresenter* presenter)
 {
-    if (m_metaData && m_loadedProj)
+    if (m_metaData && m_loadedData && m_loadedProj)
         return true;
     if (!loadProj(presenter))
         return false;
@@ -176,7 +176,7 @@ bool AudioGroupDataCollection::_attemptLoad(AudioGroupFilePresenter* presenter)
             break;
     }
     
-    if (m_metaData && m_loadedProj)
+    if (m_metaData && m_loadedData)
     {
         m_loadedProj.emplace(amuse::AudioGroupProject::CreateAudioGroupProject(*m_loadedData));
         return true;
@@ -426,7 +426,9 @@ bool AudioGroupDataCollection::loadMeta(AudioGroupFilePresenter* presenter)
                 return [NSNumber numberWithInt:NSMixedState];
         }
         else if ([tableColumn.identifier isEqualToString:@"DetailsColumn"])
-            return [NSString stringWithFormat:@"%" PRISize " groups", collection.m_groups.size()];
+            return [NSString stringWithFormat:@"%zu Audio Group%s",
+                    collection.m_groups.size(),
+                    collection.m_groups.size() > 1 ? "s" : ""];
     }
     else if ([item isKindOfClass:[AudioGroupDataToken class]])
     {
@@ -437,8 +439,22 @@ bool AudioGroupDataCollection::loadMeta(AudioGroupFilePresenter* presenter)
         {
             if (!data.m_loadedProj)
                 return @"";
-            return [NSString stringWithFormat:@"%zu SongGroups, %zu SFXGroups",
-                    data.m_loadedProj->songGroups().size(), data.m_loadedProj->sfxGroups().size()];
+            if (data.m_loadedProj->songGroups().size() && data.m_loadedProj->sfxGroups().size())
+                return [NSString stringWithFormat:@"%zu Song Group%s, %zu SFX Group%s",
+                        data.m_loadedProj->songGroups().size(),
+                        data.m_loadedProj->songGroups().size() > 1 ? "s" : "",
+                        data.m_loadedProj->sfxGroups().size(),
+                        data.m_loadedProj->sfxGroups().size() > 1 ? "s" : ""];
+            else if (data.m_loadedProj->songGroups().size())
+                return [NSString stringWithFormat:@"%zu Song Group%s",
+                        data.m_loadedProj->songGroups().size(),
+                        data.m_loadedProj->songGroups().size() > 1 ? "s" : ""];
+            else if (data.m_loadedProj->sfxGroups().size())
+                return [NSString stringWithFormat:@"%zu SFX Group%s",
+                        data.m_loadedProj->sfxGroups().size(),
+                        data.m_loadedProj->sfxGroups().size() > 1 ? "s" : ""];
+            else
+                return @"";
         }
     }
     
@@ -505,6 +521,27 @@ bool AudioGroupDataCollection::loadMeta(AudioGroupFilePresenter* presenter)
     [(AppDelegate*)NSApp.delegate outlineView:ov selectionChanged:item];
 }
 
+- (NSDragOperation)outlineView:(NSOutlineView *)outlineView validateDrop:(id<NSDraggingInfo>)info proposedItem:(id)item proposedChildIndex:(NSInteger)index
+{
+    [outlineView setDropItem:nil dropChildIndex:NSOutlineViewDropOnItemIndex];
+    NSPasteboard* pboard = [info draggingPasteboard];
+    if ([[pboard types] containsObject:NSURLPboardType])
+        return NSDragOperationCopy;
+    return NSDragOperationNone;
+}
+
+- (BOOL)outlineView:(NSOutlineView *)outlineView acceptDrop:(id<NSDraggingInfo>)info item:(id)item childIndex:(NSInteger)index
+{
+    NSPasteboard* pboard = [info draggingPasteboard];
+    if ([[pboard types] containsObject:NSURLPboardType])
+    {
+        NSURL* url = [NSURL URLFromPasteboard:pboard];
+        [(AppDelegate*)NSApp.delegate importURL:url];
+        return YES;
+    }
+    return NO;
+}
+
 - (BOOL)addCollectionName:(std::string&&)name items:(std::vector<std::pair<std::string, amuse::IntrusiveAudioGroupData>>&&)collection
 {
     NSFileCoordinator* coord = [[NSFileCoordinator alloc] initWithFilePresenter:self];
@@ -560,6 +597,7 @@ bool AudioGroupDataCollection::loadMeta(AudioGroupFilePresenter* presenter)
         }
     }];
     
+    [self resetIterators];
     return true;
 }
 
@@ -627,7 +665,18 @@ bool AudioGroupDataCollection::loadMeta(AudioGroupFilePresenter* presenter)
 
 - (void)removeSelectedItem
 {
-
+    id item = [lastOutlineView itemAtRow:lastOutlineView.selectedRow];
+    if ([item isKindOfClass:[AudioGroupCollectionToken class]])
+    {
+        AudioGroupCollection& collection = *((AudioGroupCollectionToken*)item)->m_collection;
+        NSURL* collectionURL = collection.m_url;
+        NSString* lastComp = collectionURL.lastPathComponent;
+        m_audioGroupCollections.erase(lastComp.UTF8String);
+        [self resetIterators];
+        [[NSFileManager defaultManager] removeItemAtURL:collectionURL error:nil];
+        if (m_audioGroupCollections.empty())
+            [(AppDelegate*)NSApp.delegate outlineView:(DataOutlineView*)lastOutlineView selectionChanged:nil];
+    }
 }
 
 - (id)init
diff --git a/AudioUnit/ContainerInfo.plist b/AudioUnit/ContainerInfo.plist
index c8d7614..21fbe26 100644
--- a/AudioUnit/ContainerInfo.plist
+++ b/AudioUnit/ContainerInfo.plist
@@ -4,6 +4,17 @@
 <dict>
     <key>CFBundleDevelopmentRegion</key>
     <string>en</string>
+    <key>CFBundleDocumentTypes</key>
+    <array>
+        <dict>
+            <key>CFBundleTypeRole</key>
+            <string>Viewer</string>
+            <key>LSItemContentTypes</key>
+            <array>
+                <string>public.data</string>
+            </array>
+        </dict>
+    </array>
     <key>CFBundleExecutable</key>
     <string>amuse-au-container</string>
     <key>CFBundleIconFile</key>
diff --git a/lib/ContainerRegistry.cpp b/lib/ContainerRegistry.cpp
index 6ecf036..1fbfe29 100644
--- a/lib/ContainerRegistry.cpp
+++ b/lib/ContainerRegistry.cpp
@@ -49,17 +49,17 @@ const char* ContainerRegistry::TypeToName(Type tp)
     case Type::MetroidPrime2:
         return "Metroid Prime 2 (GCN)";
     case Type::RogueSquadronPC:
-        return "Star Wars: Rogue Squadron (PC)";
+        return "Star Wars - Rogue Squadron (PC)";
     case Type::RogueSquadronN64:
-        return "Star Wars: Rogue Squadron (N64)";
+        return "Star Wars - Rogue Squadron (N64)";
     case Type::BattleForNabooPC:
-        return "Star Wars Episode I: Battle for Naboo (PC)";
+        return "Star Wars Episode I - Battle for Naboo (PC)";
     case Type::BattleForNabooN64:
-        return "Star Wars Episode I: Battle for Naboo (N64)";
+        return "Star Wars Episode I - Battle for Naboo (N64)";
     case Type::RogueSquadron2:
-        return "Star Wars: Rogue Squadron 2 (GCN)";
+        return "Star Wars - Rogue Squadron 2 (GCN)";
     case Type::RogueSquadron3:
-        return "Star Wars: Rogue Squadron 3 (GCN)";
+        return "Star Wars - Rogue Squadron 3 (GCN)";
     }
 }
 
@@ -536,23 +536,26 @@ static std::vector<std::pair<std::string, IntrusiveAudioGroupData>> LoadMP2(FILE
                         uint32_t sampSz;
                         fread(&sampSz, 1, 4, fp);
                         sampSz = SBig(sampSz);
+                        
+                        if (projSz && poolSz && sdirSz && sampSz)
+                        {
+                            std::unique_ptr<uint8_t[]> pool(new uint8_t[poolSz]);
+                            fread(pool.get(), 1, poolSz, fp);
 
-                        std::unique_ptr<uint8_t[]> pool(new uint8_t[poolSz]);
-                        fread(pool.get(), 1, poolSz, fp);
+                            std::unique_ptr<uint8_t[]> proj(new uint8_t[projSz]);
+                            fread(proj.get(), 1, projSz, fp);
 
-                        std::unique_ptr<uint8_t[]> proj(new uint8_t[projSz]);
-                        fread(proj.get(), 1, projSz, fp);
+                            std::unique_ptr<uint8_t[]> sdir(new uint8_t[sdirSz]);
+                            fread(sdir.get(), 1, sdirSz, fp);
 
-                        std::unique_ptr<uint8_t[]> sdir(new uint8_t[sdirSz]);
-                        fread(sdir.get(), 1, sdirSz, fp);
+                            std::unique_ptr<uint8_t[]> samp(new uint8_t[sampSz]);
+                            fread(samp.get(), 1, sampSz, fp);
 
-                        std::unique_ptr<uint8_t[]> samp(new uint8_t[sampSz]);
-                        fread(samp.get(), 1, sampSz, fp);
-
-                        ret.emplace_back(std::move(name), IntrusiveAudioGroupData{proj.release(), projSz,
-                                                                                  pool.release(), poolSz,
-                                                                                  sdir.release(), sdirSz,
-                                                                                  samp.release(), sampSz, GCNDataTag{}});
+                            ret.emplace_back(std::move(name), IntrusiveAudioGroupData{proj.release(), projSz,
+                                                                                      pool.release(), poolSz,
+                                                                                      sdir.release(), sdirSz,
+                                                                                      samp.release(), sampSz, GCNDataTag{}});
+                        }
                     }
                 }
                 FSeek(fp, origPos, SEEK_SET);
@@ -1287,10 +1290,13 @@ static std::vector<std::pair<std::string, IntrusiveAudioGroupData>> LoadRS2(FILE
                 std::unique_ptr<uint8_t[]> samp(new uint8_t[head.sampLen]);
                 memcpy(samp.get(), audData.get() + head.sampOff, head.sampLen);
 
-                char name[128];
-                snprintf(name, 128, "GroupFile%u", j);
-                ret.emplace_back(name, IntrusiveAudioGroupData{proj.release(), head.projLen, pool.release(), head.poolLen,
-                                                               sdir.release(), head.sdirLen, samp.release(), head.sampLen, GCNDataTag{}});
+                if (head.projLen && head.poolLen && head.sdirLen && head.sampLen)
+                {
+                    char name[128];
+                    snprintf(name, 128, "GroupFile%u", j);
+                    ret.emplace_back(name, IntrusiveAudioGroupData{proj.release(), head.projLen, pool.release(), head.poolLen,
+                                                                   sdir.release(), head.sdirLen, samp.release(), head.sampLen, GCNDataTag{}});
+                }
             }
 
             break;
@@ -1457,10 +1463,13 @@ static std::vector<std::pair<std::string, IntrusiveAudioGroupData>> LoadRS3(FILE
                 std::unique_ptr<uint8_t[]> samp(new uint8_t[head.sampLen]);
                 memcpy(samp.get(), audData.get() + head.sampOff, head.sampLen);
 
-                char name[128];
-                snprintf(name, 128, "GroupFile%u", j);
-                ret.emplace_back(name, IntrusiveAudioGroupData{proj.release(), head.projLen, pool.release(), head.poolLen,
-                                                               sdir.release(), head.sdirLen, samp.release(), head.sampLen, GCNDataTag{}});
+                if (head.projLen && head.poolLen && head.sdirLen && head.sampLen)
+                {
+                    char name[128];
+                    snprintf(name, 128, "GroupFile%u", j);
+                    ret.emplace_back(name, IntrusiveAudioGroupData{proj.release(), head.projLen, pool.release(), head.poolLen,
+                                                                   sdir.release(), head.sdirLen, samp.release(), head.sampLen, GCNDataTag{}});
+                }
             }
 
             break;