I know about the MP3 station but can't seem to get it to work. i have tried saving tracks from my CDs using Win Media player, Real One Player and winamp. Does it not support these files or is it just never gonna work?
Off the top of my head but I think you need to create a folder in the main GTA folder alongside the other radio stations and stash your MP3s in there. There are some GTA forums on sites like Gamespot, you might find more detailed instructions there.