PSP CheatUp is an application designed to simplify the task of updating the cheat codes through the use of the PSP’s Wifi and a wireless internet connection.

Changes:

Added: Region filtering (EU, US and JP) for GameList.
Added: GameList search function (if search term is a Game ID available cheats are listed).
Fixed: Problem extracting files from ZIP archive which aren’t compressed.
Other: CMF and NitePR cheat files are only extracted if the file size is different to the file in the archive.
Other: Will now load on 6.xx custom firmwares.

http://forums.qj.net/psp-development-forum/162905-release-psp-cheatup-ver-0-40-a.html