alternate firmwares for an mp3 player?

[Fittersman]

im sick of the firmware on my truly pic 'n roll mp310 plus mp3 player... I think that the developers of the program that runs it (an OS?, can you call it an OS?) made a few too many mistakes in the user like-ability department... So much stuff on it that could be far better

but anyway, what im asking is that does anyone know of an alternate firmware or program that i could put on it instead?

[macogw]

Rockbox is OSS digital audio player firmware that'll do pretty much any codec on the planet. It works on a lot of them, so look into it and see if yours is supported. Mine, unfortunately, isn't.

[Fittersman]

mine isnt either :(