diff --git a/OpenRA.Editor/Form1.cs b/OpenRA.Editor/Form1.cs
index be717453f5..c34181cb09 100755
--- a/OpenRA.Editor/Form1.cs
+++ b/OpenRA.Editor/Form1.cs
@@ -62,7 +62,7 @@ namespace OpenRA.Editor
 			Game.modData = new ModData(currentMod);
 
 			// load the map
-			var map = new Map(new Folder(mapname));
+			var map = new Map(new Folder(mapname, 0));
 
 			// upgrade maps that have no player definitions. editor doesnt care,
 			// but this breaks the game pretty badly.
diff --git a/OpenRA.Editor/MapSelect.cs b/OpenRA.Editor/MapSelect.cs
index c0284b3dda..7d024c9953 100644
--- a/OpenRA.Editor/MapSelect.cs
+++ b/OpenRA.Editor/MapSelect.cs
@@ -39,7 +39,7 @@ namespace OpenRA.Editor
             if (MapList.SelectedItems.Count == 1)
             {
                 txtNew.Text = MapList.SelectedItems[0].Text;
-                var map = new Map(new Folder(Path.Combine(MapFolderPath, MapList.SelectedItems[0].Text)));
+                var map = new Map(new Folder(Path.Combine(MapFolderPath, MapList.SelectedItems[0].Text), 0));
                 txtTitle.Text = map.Title;
                 txtAuthor.Text = map.Author;
                 txtTheater.Text = map.Theater;
diff --git a/OpenRA.FileFormats/CompressedPackage.cs b/OpenRA.FileFormats/CompressedPackage.cs
index fa04960878..0dbba955dc 100644
--- a/OpenRA.FileFormats/CompressedPackage.cs
+++ b/OpenRA.FileFormats/CompressedPackage.cs
@@ -21,9 +21,11 @@ namespace OpenRA.FileFormats
 		readonly uint[] hashes;
 		readonly Stream s;
 		readonly ZipPackage pkg;
+		int priority;
 
-		public CompressedPackage(string filename)
+		public CompressedPackage(string filename, int priority)
 		{
+			this.priority = priority;
 			s = FileSystem.Open(filename);
 			pkg = (ZipPackage)ZipPackage.Open(s, FileMode.Open);
 			hashes = pkg.GetParts()
@@ -45,7 +47,7 @@ namespace OpenRA.FileFormats
 
 		public int Priority
 		{
-			get { return 1; }
+			get { return 500 + priority; }
 		}
 	}
 }
diff --git a/OpenRA.FileFormats/FileSystem.cs b/OpenRA.FileFormats/FileSystem.cs
index 5ab7e8d5f6..e3767c2a16 100644
--- a/OpenRA.FileFormats/FileSystem.cs
+++ b/OpenRA.FileFormats/FileSystem.cs
@@ -34,14 +34,16 @@ namespace OpenRA.FileFormats
 			}
 		}
 
+		static int order = 0;
+
 		static IFolder OpenPackage(string filename)
 		{
 			if (filename.EndsWith(".mix"))
-				return new Package(filename);
+				return new Package(filename, order++);
 			else if (filename.EndsWith(".zip"))
-				return new CompressedPackage(filename);
+				return new CompressedPackage(filename, order++);
 			else
-				return new Folder(filename);
+				return new Folder(filename, order++);
 		}
 
 		public static void Mount(string name)
@@ -76,7 +78,7 @@ namespace OpenRA.FileFormats
 		{
 			var folder = index[PackageEntry.HashFilename(filename)]
 				.Where(x => x.Exists(filename))
-				.OrderByDescending(x => x.Priority)
+				.OrderBy(x => x.Priority)
 				.FirstOrDefault();
 
 			if (folder != null)
diff --git a/OpenRA.FileFormats/Folder.cs b/OpenRA.FileFormats/Folder.cs
index 9666d86808..09a83da257 100644
--- a/OpenRA.FileFormats/Folder.cs
+++ b/OpenRA.FileFormats/Folder.cs
@@ -17,7 +17,9 @@ namespace OpenRA.FileFormats
 	{
 		readonly string path;
 
-		public Folder(string path) { this.path = path; }
+		int priority;
+
+		public Folder(string path, int priority) { this.path = path; this.priority = priority; }
 
 		public Stream GetContent(string filename)
 		{
@@ -39,7 +41,7 @@ namespace OpenRA.FileFormats
 
 		public int Priority
 		{
-			get { return 100; }
+			get { return priority; }
 		}
 	}
 }
diff --git a/OpenRA.FileFormats/Package.cs b/OpenRA.FileFormats/Package.cs
index 3ff551d4b3..ef70195f37 100644
--- a/OpenRA.FileFormats/Package.cs
+++ b/OpenRA.FileFormats/Package.cs
@@ -29,9 +29,11 @@ namespace OpenRA.FileFormats
 		readonly bool isRmix, isEncrypted;
 		readonly long dataStart;
 		readonly Stream s;
+		int priority;
 
-		public Package(string filename)
+		public Package(string filename, int priority)
 		{
+			this.priority = priority;
 			s = FileSystem.Open(filename);
 
 			BinaryReader reader = new BinaryReader(s);
@@ -154,7 +156,7 @@ namespace OpenRA.FileFormats
 
 		public int Priority
 		{
-			get { return 0; }
+			get { return 1000 + priority; }
 		}
 	}
 
diff --git a/OpenRA.Game/Map.cs b/OpenRA.Game/Map.cs
index 4fccdaf239..592bdf979a 100755
--- a/OpenRA.Game/Map.cs
+++ b/OpenRA.Game/Map.cs
@@ -184,7 +184,7 @@ namespace OpenRA
 		public void Save(string filepath)
 		{
 			// Todo: save to a zip file in the support dir by default
-			Package = new Folder(filepath);
+			Package = new Folder(filepath, 0);
 			MapFormat = 3;
 			
 			var root = new List<MiniYamlNode>();
diff --git a/OpenRA.Game/ModData.cs b/OpenRA.Game/ModData.cs
index 277fbf5833..7942b77cab 100755
--- a/OpenRA.Game/ModData.cs
+++ b/OpenRA.Game/ModData.cs
@@ -50,7 +50,7 @@ namespace OpenRA
 				.Where(p => Directory.Exists(p))
 				.SelectMany(p => Directory.GetDirectories(p)).ToList();
 
-			return paths.Select(p => new MapStub(new Folder(p))).ToDictionary(m => m.Uid);
+			return paths.Select(p => new MapStub(new Folder(p, 0))).ToDictionary(m => m.Uid);
 		}
 		
 		string cachedTheatre = null;