diff --git a/stepmania/src/RageFileDriver.cpp b/stepmania/src/RageFileDriver.cpp
index 196a11e4a8..eaea572593 100644
--- a/stepmania/src/RageFileDriver.cpp
+++ b/stepmania/src/RageFileDriver.cpp
@@ -115,9 +115,9 @@ int RageFileDriver::GetFileSizeInBytes( const CString &sPath )
 	return FDB->GetFileSize( sPath );
 }
 
-int RageFileDriver::GetFileModTime( const CString &sPath )
+int RageFileDriver::GetFileHash( const CString &sPath )
 {
-	return FDB->GetFileModTime( sPath );
+	return FDB->GetFileHash( sPath );
 }
 
 void RageFileDriver::FlushDirCache( const CString &sPath )
diff --git a/stepmania/src/RageFileDriver.h b/stepmania/src/RageFileDriver.h
index 89959d9684..ec4dc94e37 100644
--- a/stepmania/src/RageFileDriver.h
+++ b/stepmania/src/RageFileDriver.h
@@ -15,7 +15,7 @@ public:
 	virtual void GetDirListing( const CString &sPath, CStringArray &AddTo, bool bOnlyDirs, bool bReturnPathToo );
 	virtual RageFileManager::FileType GetFileType( const CString &sPath );
 	virtual int GetFileSizeInBytes( const CString &sFilePath );
-	virtual int GetFileModTime( const CString &sPath );
+	virtual int GetFileHash( const CString &sPath );
 	virtual int GetPathValue( const CString &path );
 	virtual bool Ready() { return true; } /* see RageFileManager::MountpointIsReady */
 	virtual void FlushDirCache( const CString &sPath );
diff --git a/stepmania/src/RageFileDriverDirect.cpp b/stepmania/src/RageFileDriverDirect.cpp
index b27cd605a0..a198db8583 100644
--- a/stepmania/src/RageFileDriverDirect.cpp
+++ b/stepmania/src/RageFileDriverDirect.cpp
@@ -69,7 +69,7 @@ void DirectFilenameDB::PopulateFileSet( FileSet &fs, const CString &path )
 		f.SetName( fd.cFileName );
 		f.dir = !!(fd.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY);
 		f.size = fd.nFileSizeLow;
-		f.mtime = fd.ftLastWriteTime.dwLowDateTime;
+		f.hash = fd.ftLastWriteTime.dwLowDateTime;
 
 		fs.files.insert(f);
 	} while( FindNextFile( hFind, &fd ) );
@@ -112,7 +112,7 @@ void DirectFilenameDB::PopulateFileSet( FileSet &fs, const CString &path )
 		} else {
 			f.dir = (st.st_mode & S_IFDIR);
 			f.size = st.st_size;
-			f.mtime = st.st_mtime;
+			f.hash = st.st_mtime;
 		}
 
 		fs.files.insert(f);
diff --git a/stepmania/src/RageFileManager.cpp b/stepmania/src/RageFileManager.cpp
index 2c10f10033..8023779387 100644
--- a/stepmania/src/RageFileManager.cpp
+++ b/stepmania/src/RageFileManager.cpp
@@ -18,7 +18,7 @@ public:
 	RageFileDriverMountpoints(): RageFileDriver( new FilenameDB ) { }
 	RageFileObj *Open( const CString &path, RageFile::OpenMode mode, RageFile &p, int &err )
 	{
-		err = EINVAL;
+		err = (mode == RageFile::WRITE)? EINVAL:ENOENT;
 		return NULL;
 	}
 	void FlushDirCache( const CString &sPath ) { }
@@ -257,14 +257,14 @@ int RageFileManager::GetFileSizeInBytes( const CString &sPath )
 	return -1;
 }
 
-int RageFileManager::GetFileModTime( const CString &sPath )
+int RageFileManager::GetFileHash( const CString &sPath )
 {
 	for( unsigned i = 0; i < g_Drivers.size(); ++i )
 	{
 		const CString p = g_Drivers[i].GetPath( sPath );
 		if( p.size() == 0 )
 			continue;
-		int ret = g_Drivers[i].driver->GetFileModTime( p );
+		int ret = g_Drivers[i].driver->GetFileHash( p );
 		if( ret != -1 )
 			return ret;
 	}
@@ -288,7 +288,6 @@ RageFileObj *RageFileManager::Open( const CString &sPath, RageFile::OpenMode mod
 	if( mode == RageFile::WRITE )
 		return OpenForWriting( sPath, mode, p, err );
 
-	/* XXX: WRITE logic */
 	for( unsigned i = 0; i < g_Drivers.size(); ++i )
 	{
 		const CString path = g_Drivers[i].GetPath( sPath );
@@ -393,11 +392,6 @@ unsigned GetFileSizeInBytes( const CString &sPath )
 	return FILEMAN->GetFileSizeInBytes( sPath );
 }
 
-int GetFileModTime( const CString &sPath )
-{
-	return FILEMAN->GetFileModTime( sPath );
-}
-
 void GetDirListing( const CString &sPath, CStringArray &AddTo, bool bOnlyDirs, bool bReturnPathToo )
 {
 	FILEMAN->GetDirListing( sPath, AddTo, bOnlyDirs, bReturnPathToo );
@@ -408,3 +402,25 @@ void FlushDirCache()
 	FILEMAN->FlushDirCache( "" );
 }
 
+
+unsigned int GetHashForFile( const CString &sPath )
+{
+	return GetHashForString( sPath ) + FILEMAN->GetFileHash( sPath );
+}
+
+unsigned int GetHashForDirectory( const CString &sDir )
+{
+	unsigned int hash = 0;
+
+	hash += GetHashForFile( sDir );
+
+	CStringArray arrayFiles;
+	GetDirListing( sDir+"*", arrayFiles, false );
+	for( unsigned i=0; i<arrayFiles.size(); i++ )
+	{
+		const CString sFilePath = sDir + arrayFiles[i];
+		hash += GetHashForFile( sFilePath );
+	}
+
+	return hash; 
+}
diff --git a/stepmania/src/RageFileManager.h b/stepmania/src/RageFileManager.h
index a5fa27e322..27e33d41bd 100644
--- a/stepmania/src/RageFileManager.h
+++ b/stepmania/src/RageFileManager.h
@@ -20,7 +20,7 @@ public:
 	bool DoesFileExist( const CString &sPath );
 
 	int GetFileSizeInBytes( const CString &sPath );
-	int GetFileModTime( const CString &sPath );
+	int GetFileHash( const CString &sPath );
 
 	void Mount( CString Type, CString RealPath, CString MountPoint );
 	bool IsMounted( CString MountPoint );
diff --git a/stepmania/src/RageUtil.cpp b/stepmania/src/RageUtil.cpp
index c27a5d342d..f276cccc3b 100644
--- a/stepmania/src/RageUtil.cpp
+++ b/stepmania/src/RageUtil.cpp
@@ -354,34 +354,6 @@ unsigned int GetHashForString ( const CString &s )
 	return crc;
 }
 
-unsigned int GetHashForFile( const CString &sPath )
-{
-	unsigned int hash = 0;
-
-	hash += GetHashForString( sPath );
-	hash += GetFileSizeInBytes( sPath ); 
-	hash += GetFileModTime( sPath );
-
-	return hash;
-}
-
-unsigned int GetHashForDirectory( const CString &sDir )
-{
-	unsigned int hash = 0;
-
-	hash += GetHashForFile( sDir );
-
-	CStringArray arrayFiles;
-	GetDirListing( sDir+"*", arrayFiles, false );
-	for( unsigned i=0; i<arrayFiles.size(); i++ )
-	{
-		const CString sFilePath = sDir + arrayFiles[i];
-		hash += GetHashForFile( sFilePath );
-	}
-
-	return hash; 
-}
-
 /* Return true if "dir" is empty or does not exist. */
 bool DirectoryIsEmpty( const CString &dir )
 {
diff --git a/stepmania/src/RageUtil.h b/stepmania/src/RageUtil.h
index 1aede0dbbb..add817d280 100644
--- a/stepmania/src/RageUtil.h
+++ b/stepmania/src/RageUtil.h
@@ -282,7 +282,6 @@ bool IsAFile( const CString &sPath );
 bool IsADirectory( const CString &sPath );
 bool ResolvePath(CString &path);
 unsigned GetFileSizeInBytes( const CString &sFilePath );
-int GetFileModTime( const CString &sPath );
 void FlushDirCache();
 
 // helper file functions used by Bookkeeper and ProfileManager
diff --git a/stepmania/src/RageUtil_FileDB.cpp b/stepmania/src/RageUtil_FileDB.cpp
index 25ede452c9..be3dcdee0f 100644
--- a/stepmania/src/RageUtil_FileDB.cpp
+++ b/stepmania/src/RageUtil_FileDB.cpp
@@ -69,12 +69,12 @@ int FileSet::GetFileSize(const CString &path) const
 	return i->size;
 }
 
-int FileSet::GetFileModTime(const CString &path) const
+int FileSet::GetFileHash(const CString &path) const
 {
 	set<File>::const_iterator i = files.find( File(path) );
 	if(i == files.end())
 		return -1;
-	return i->mtime;
+	return i->hash + i->size;
 }
 
 /* Given "foo/bar/baz/" or "foo/bar/baz", return "foo/bar/" and "baz". */
@@ -117,12 +117,12 @@ int FilenameDB::GetFileSize( const CString &sPath )
 	return fs.GetFileSize(Name);
 }
 
-int FilenameDB::GetFileModTime( const CString &sPath )
+int FilenameDB::GetFileHash( const CString &sPath )
 {
 	CString Dir, Name;
 	SplitPath(sPath, Dir, Name);
 	FileSet &fs = GetFileSet( Dir );
-	return fs.GetFileModTime(Name);
+	return fs.GetFileHash(Name);
 }
 
 /* XXX: this won't work right for URIs, eg \\foo\bar */
@@ -243,7 +243,7 @@ void FilenameDB::AddFileSet( CString sPath, FileSet *fs )
 
 /* Add the file or directory "sPath".  sPath is a directory if it ends with
  * a slash. */
-void FilenameDB::AddFile( const CString &sPath, int size, int mtime, void *priv )
+void FilenameDB::AddFile( const CString &sPath, int size, int hash, void *priv )
 {
 	vector<CString> parts;
 	split( sPath, "/", parts, false );
@@ -272,7 +272,7 @@ void FilenameDB::AddFile( const CString &sPath, int size, int mtime, void *priv
 			if( !IsDir )
 			{
 				f.size = size;
-				f.mtime = mtime;
+				f.hash = hash;
 				f.priv = priv;
 			}
 			fs.files.insert( f );
@@ -347,22 +347,3 @@ void FilenameDB::GetDirListing( CString sPath, CStringArray &AddTo, bool bOnlyDi
 
 bool ResolvePath(CString &path) { return true; } // XXX
 
-
-#if 0
-bool DoesFileExist( const CString &sPath ) { return FDB.GetFileType( sPath ) != TTYPE_NONE; }
-bool IsAFile( const CString &sPath ) { return FDB.GetFileType( sPath ) == TTYPE_FILE; }
-bool IsADirectory( const CString &sPath ) { return FDB.GetFileType( sPath ) == TTYPE_DIR; }
-int GetFileModTime( const CString &sPath ) { return FDB.GetFileModTime(sPath); }
-unsigned GetFileSizeInBytes( const CString &sPath )
-{
-	int ret = FDB.GetFileSize(sPath);
-//	LOG->Trace("file '%s' size %i", sPath.c_str(), ret);
-	if( ret == -1 )
-		return 0;
-	return ret;
-}
-void GetDirListing( CString sPath, CStringArray &AddTo, bool bOnlyDirs, bool bReturnPathToo )
-{
-	FDB.GetDirListing( sPath, AddTo, bOnlyDirs, bReturnPathToo );
-}
-#endif
diff --git a/stepmania/src/RageUtil_FileDB.h b/stepmania/src/RageUtil_FileDB.h
index 84d2134604..4e192181f5 100644
--- a/stepmania/src/RageUtil_FileDB.h
+++ b/stepmania/src/RageUtil_FileDB.h
@@ -23,15 +23,15 @@ struct File
 	int size;
 	/* Modification time of the file.  The contents of this is undefined, except that
 	 * when the file has been modified, this value will change. */
-	int mtime;
+	int hash;
 
 	/* Private data, for RageFileDrivers. */
 	void *priv;
-	File() { dir=false; size=-1; mtime=-1; priv=NULL;}
+	File() { dir=false; size=-1; hash=-1; priv=NULL;}
 	File( const CString &fn )
 	{
 		SetName( fn );
-		dir=false; size=-1; mtime=-1; priv=NULL;
+		dir=false; size=-1; hash=-1; priv=NULL;
 	}
 	
 	bool operator== (const File &rhs) const { return lname==rhs.lname; }
@@ -58,7 +58,7 @@ struct FileSet
 
 	FileType GetFileType( const CString &path ) const;
 	int GetFileSize(const CString &path) const;
-	int GetFileModTime(const CString &path) const;
+	int GetFileHash(const CString &path) const;
 };
 
 class FilenameDB
@@ -85,7 +85,7 @@ public:
 		ExpireSeconds( -1 ) { }
 	virtual FilenameDB::~FilenameDB() { FlushDirCache(); }
 
-	void AddFile( const CString &sPath, int size, int mtime, void *priv=NULL );
+	void AddFile( const CString &sPath, int size, int hash, void *priv=NULL );
 	File *GetFile( const CString &path );
 
 	/* This handles at most two * wildcards.  If we need anything more complicated,
@@ -98,7 +98,7 @@ public:
 
 	FileType GetFileType( const CString &path );
 	int GetFileSize(const CString &path);
-	int GetFileModTime( const CString &sFilePath );
+	int GetFileHash( const CString &sFilePath );
 	void GetDirListing( CString sPath, CStringArray &AddTo, bool bOnlyDirs, bool bReturnPathToo );
 
 	void FlushDirCache();