Homebrew Developer Akez has come out with the PSP Wave Changer v1.2. If you've been using a previous version, it would be worth upgrading to this as it further refines the application by adding more functions.

This software allows users to flash their own waves unto a PSP. Since it's initial 1.0 release, the developer has added a Graphical User Interface as well as removing the 20 wave cap that was in previous versions. In addition to this, the "up-an-down" bug has been fixed, making this a lot more reliable for prolonged use.

Note that the homebrew has only been tested on 3.52 m33-2 firmware, so it is still unsure if it will work on any other firmware. Akez has also given word that there is a slight chance that this might brick your PSP, so be sure to follow the instructions in the documentation of the program to minimize the risk.

Download: PSP Wave Changer v1.2
Visit: QJ.net Development Forums