[andrewas]

Digitaly rip the tracks to HDD and play from there. Saves switching CDs around.

Or, to actualy fix the problem, remember that music plays through the analogue passthrough, not the IDE cable. Most sound cards have a CD-audio in, and an identical plug marked aux-in. My experience is that both ports are equivalent. So plug the second audio passthrough into that, make sure CD-player is set to the correct drive, and it should all work.