If anyone has a util (source?) to split mp3s, I can try hacking around a bit when I get some time

If you look at your MP3 files in a hex editor (such as UltraEdit), you can see the frame boundaries pretty clearly and can split the files yourself by hand. It's a lot easier than you might think. The detailed specifications for the frame headers are here if you want them.

Tony Fabris
Empeg #144