Yeah, i ripped the Quake II tracks a few years ago.... ah.. those we're the LAN days. Anyhow... I remember figuring it out because you could pop in another audio CD while playing the game and have that play as your background, so i figured that it must get it's own music in the same format. Good stuff. Haven't tried it on any recent disks... that hasn't been anything that had a soundtrack i liked that much anyhow. =]