To do so, you'd need to implement your own player software on the Rio Car. In fact, getting a working MP3 player with a working UI running locally on the carplayer is just the first step towards implementing a rio receiver client.

Some people over on the Rio Receiver BBS have already implemented working player clients on that platform. Perhaps it's as simple as porting one of those to the car player?

I've been wondering when someone would get around to making a replacement player binary on the carplayer. If it were open source, we could start throwing in features we've always wanted. Plug-in visuals, anyone? V2-tag-related features? Cross fading? Ogg/FLAC playback? Who's up for it?