removing CD on your PSP without errors!
removing corrupt data is easy all you have to do is rename the files yourself. doing it with a program often leaves some games unplayable but this seems to work excellent for me. First off start with the folders like this (Nethack,& Nethack%) for the first folder only use the first four letters and capitalize them making (NETH) then space bar 28 times and press 1. you should get somthing like this (NETH 1). for the second folder name it (NETH1~1%) and the corrupt data will be gone and i believe this will work with all programs, Also if your game folder isn't four letters long then make it. hope this helps. ;) P.S. if you need to, make sure you copy the "~" if you don't know how to type it.
( For some reason the forum won't display how many spaces you need for folder two but if you just follow the instructions you can't go wrong.)