This application was written so a File Manager could be kept in a non-executable area of the memory stick and launced externally using a 4-digit pass key. That way you can keep certain images/music hidden from friends/family and view at your leisure. Another use may be to keep rename/copy/delete commands away from very young users who may be randomly pressing buttons on your psp. Check the readme for instructions!http://forums.qj.net/showthread.php?t=20162