if you put a cd in there before it boots up and it doesent read it you may have to change the bios so it reads it. i changed mine so i can leave cds in there and it wont try and read them when booting.
i got my new issue of egm and they had custers revenge for atari 2600 in there for the top 20 worst games. i tried it and i think its the funniest game ive ever played (for a few brief moments). just imagine a guy in 2600 graphics wise moving across the screen to "tag" a woman. just hilarious.