Hellcat has updated his Wallpaper Changer/Randomizer for PSP.

Changes:

Two modes of operation: “Everytime” and “Once per day” (see readme for details)
You can set special, predefined images for a specific date (again, check readme)
change the XMB background *BEHIND* the waves (a.k.a. 01-12.bmp) – WITHOUT writing to flash! 😉
Randomizing/Changing of PTF themes
Randomizing/Changing of gameboot
Randomizing/Changing of XMB waves
Randomizing/Changing of XMB font

http://forums.qj.net/showthread.php?t=132296