hey, there is one thing you can do. Get a cheapo mp3 player, like a sandisk sansa, or similar, and get a fm transmitter that plugs into your cigarette lighter. that way you can update your library as you wish, and dont have to wait for the cd to burn.
if you do choose this way, try and find one that charges from the usb port, and get a y splitter for the cig lighter, and run the fm transmitter in one, and a 12v to usb adapter
otherwize, do an overhaul and get a new stereo. a pioneer should work, thats what we got, the one that has the screen that slids out...dont see the point tho, its got like 20ms on the screen, it ghosts soooo bad, so its not even good for movies, its like watching a psp.