hmmm...let me think.
if its not sonic i dunno.

*EDIT* ahh mario lol.

Also use any wave on any firmware it's simple really open the rco in RCOedit any ver that hold the wave you want a extract the .gmo much like you would for an icon. then open your current frimware rco and replace the gmo with the one you extracted and bam it's converted pretty simple and you can use this to make a mathcing boot wave sence they are the same format .gmo so easliey copy the wave from background to boot wave lol any questions feel free to ask

I know an even easier way to make them.   ;)
I'll post a tut as soon as I get the time  

Here is some waves I made:

http://pspplayground.condor.serverpro3.c...pic=3318.0