diff --git a/OpenRA.Game/InstallUtils.cs b/OpenRA.Game/InstallUtils.cs
index 477747e913..e8fd29229f 100644
--- a/OpenRA.Game/InstallUtils.cs
+++ b/OpenRA.Game/InstallUtils.cs
@@ -44,18 +44,21 @@ namespace OpenRA
 			if (!Directory.Exists(destPath))
 				Directory.CreateDirectory(destPath);
 
-			if (!GlobalFileSystem.Exists(srcPath)) { onError("Cannot find " + package); return false; }
+			Log.Write("debug", "Mounting {0}".F(srcPath));
 			GlobalFileSystem.Mount(srcPath);
-			if (!GlobalFileSystem.Exists(package)) { onError("Cannot find " + package); return false; }
+			Log.Write("debug", "Mounting {0}".F(package));
 			GlobalFileSystem.Mount(package);
 
-			foreach (var s in files)
+			foreach (var file in files)
 			{
-				var destFile = Path.Combine(destPath, s);
-				using (var sourceStream = GlobalFileSystem.Open(s))
-				using (var destStream = File.Create(destFile))
+				var dest = Path.Combine(destPath, file);
+				if (File.Exists(dest))
+					File.Delete(dest);
+				using (var sourceStream = GlobalFileSystem.Open(file))
+				using (var destStream = File.Create(dest))
 				{
-					onProgress("Extracting " + s);
+					Log.Write("debug", "Extracting {0} to {1}".F(file, dest));
+					onProgress("Extracting " + file);
 					destStream.Write(sourceStream.ReadAllBytes());
 				}
 			}
@@ -75,8 +78,12 @@ namespace OpenRA
 				}
 
 				var destFile = Path.GetFileName(file).ToLowerInvariant();
-				onProgress("Extracting " + destFile);
-				File.Copy(fromPath,	Path.Combine(destPath, destFile), true);
+				var dest = Path.Combine(destPath, destFile);
+				if (File.Exists(dest))
+					File.Delete(dest);
+				onProgress("Copying " + destFile);
+				Log.Write("debug", "Copy {0} to {1}".F(fromPath, dest));
+				File.Copy(fromPath, dest, true);
 			}
 
 			return true;
diff --git a/OpenRA.Mods.RA/Widgets/Logic/InstallFromCDLogic.cs b/OpenRA.Mods.RA/Widgets/Logic/InstallFromCDLogic.cs
index 678dc97c0a..4b050a2c70 100644
--- a/OpenRA.Mods.RA/Widgets/Logic/InstallFromCDLogic.cs
+++ b/OpenRA.Mods.RA/Widgets/Logic/InstallFromCDLogic.cs
@@ -46,7 +46,7 @@ namespace OpenRA.Mods.RA.Widgets.Logic
 
 		bool IsValidDisk(string diskRoot)
 		{
-			var files = Game.modData.Manifest.ContentInstaller["DiskTestFiles"].Split(',');
+			var files = Game.modData.Manifest.ContentInstaller["DiskTestFiles"].Split(',').Select(x => x.Trim()).ToArray();
 			return files.All(f => File.Exists(Path.Combine(diskRoot, f)));
 		}
 
@@ -71,10 +71,10 @@ namespace OpenRA.Mods.RA.Widgets.Logic
 			installingContainer.IsVisible = () => true;
 
 			var dest = new string[] { Platform.SupportDir, "Content", Game.modData.Manifest.Mod.Id }.Aggregate(Path.Combine);
-			var copyFiles = Game.modData.Manifest.ContentInstaller["CopyFilesFromCD"].Split(',');
+			var copyFiles = Game.modData.Manifest.ContentInstaller["CopyFilesFromCD"].Split(',').Select(x => x.Trim()).ToArray();
 
-			var extractPackage = Game.modData.Manifest.ContentInstaller["PackageToExtractFromCD"];
-			var extractFiles = Game.modData.Manifest.ContentInstaller["ExtractFilesFromCD"].Split(',');
+			var extractPackage = Game.modData.Manifest.ContentInstaller["PackageToExtractFromCD"].Trim();
+			var extractFiles = Game.modData.Manifest.ContentInstaller["ExtractFilesFromCD"].Split(',').Select(x => x.Trim()).ToArray();
 
 			var installCounter = 0;
 			var installTotal = copyFiles.Count() + extractFiles.Count();
@@ -93,16 +93,24 @@ namespace OpenRA.Mods.RA.Widgets.Logic
 				retryButton.IsDisabled = () => false;
 			}));
 
-			var t = new Thread( _ =>
+			new Thread(() =>
 			{
 				try
 				{
 					if (!InstallUtils.CopyFiles(source, copyFiles, dest, onProgress, onError))
+					{
+						onError("Copying files from CD failed.");
 						return;
+					}
 
 					if (!string.IsNullOrEmpty(extractPackage))
+					{
 						if (!InstallUtils.ExtractFromPackage(source, extractPackage, extractFiles, dest, onProgress, onError))
+						{
+							onError("Extracting files from CD failed.");
 							return;
+						}
+					}
 
 					Game.RunAfterTick(() =>
 					{
@@ -111,12 +119,13 @@ namespace OpenRA.Mods.RA.Widgets.Logic
 						continueLoading();
 					});
 				}
-				catch
+				catch(Exception e)
 				{
-					onError("Installation failed");
+					onError("Installation failed.\n{0}".F(e.Message));
+					Log.Write("debug", e.ToString());
+					return;
 				}
-			}) { IsBackground = true };
-			t.Start();
+			}) { IsBackground = true }.Start();
 		}
 	}
 }
diff --git a/mods/cnc/mod.yaml b/mods/cnc/mod.yaml
index b9fb40eba7..a4b7ad8f8e 100644
--- a/mods/cnc/mod.yaml
+++ b/mods/cnc/mod.yaml
@@ -137,10 +137,10 @@ ContentInstaller:
 	FilesToCopy: CONQUER.MIX, DESERT.MIX, SCORES.MIX, SOUNDS.MIX, TEMPERAT.MIX, WINTER.MIX
 	FilesToExtract: speech.mix, tempicnh.mix, transit.mix
 	PackageMirrorList: http://openra.net/packages/cnc-mirrors.txt
-	DiskTestFiles: CONQUER.MIX, DESERT.MIX INSTALL/SETUP.Z
-	PackageToExtractFromCD: INSTALL/SETUP.Z
+	DiskTestFiles: conquer.mix, desert.mix, install/setup.z
+	PackageToExtractFromCD: install/setup.z
 	ExtractFilesFromCD: speech.mix, tempicnh.mix, transit.mix
-	CopyFilesFromCD: CONQUER.MIX, DESERT.MIX, SCORES.MIX, SOUNDS.MIX, TEMPERAT.MIX, WINTER.MIX
+	CopyFilesFromCD: conquer.mix, desert.mix, general.mix, scores.mix, sounds.mix, temperat.mix, winter.mix
 	ShippedSoundtracks: 2
 	MusicPackageMirrorList: http://www.openra.net/packages/cnc-music-mirrors.txt