You can use the info about the ACL file from Unreal 2:
Xbox Live
/dashupdate.xbe
/downloader.xbe
/media/
/update.xbe
Language Files
/Snd/Files/DE/
/Snd/Files/ES/
/Snd/Files/FR/
/Snd/Files/IT/
/XMP/DE/
/XMP/ES/
/XMP/FR/
/XMP/IT/
Check it out:
http://www.maverex.net/xbox/index.php?game=127