This application by Akez flashes “own waves” to a PSP. Regarding the author it is fairly easy to use and it shouldnt brick your PSP unless the file you select to copy is not a system_plugin_bg.rco file.

Changes:

The bug in the previous version is now fixed.
Also i have made the application look better by adding a background image, etc.

http://www.megaupload.com/?d=5SW3RFDD