SmileyPyramid has released a new PSP Renamer app, heres the info:
PSP renamer 1.0 (for PSP 1.50)
===============
Summary
-------
This is an app i did for myself because i got a 1.50 psp and don't want to see corrupted icons when choosing an application in the "games" section. The best way to use it is to put the exe in X:\psp\game folder (if X=psp drive letter) and then run it from windows...
do that after you added some new homebrew app and that's it . No useless installer needed, no gui, just an exe that runs directly and does the job.
How it works?
-------------
Basically it checks the current directory for folders like xxx and xxx%,
when it finds them, it renames them to "xxx _" and xxx_~1%. Take care if the original folder name has more than 5 characters like abcdef it'll be trimmed down to 5; in case of conflict like you have ABCDE1/ABCDE1% and ABCDE2/ABCDE2%, then only ABCDE1/ABCDE1% will be renamed, the program never deletes nor overwrites anything
Advanced
--------
If you want to keep the exe in another directory like c:\programs, then run the exe with a parameter specifying the working directory, for example make a bat containing: renamer.exe F:\psp\game
(without \ after game) and use that bat.]