PalmBuzzer allows you to set sound to the 4 hardware buttons, to letters and numbers and to add a picture on top of the window.
These are the naming rules at the moment:
Every file needs to be a WAVE audio file and stored in /PALM/Programs/PalmBuzzer/
* for the 16 on-screen buttons: Test1.wav to Test16.wav
* for the 4 hardware buttons: Hard1.wav to Hard4