Glad I could help Unfortunately there's no direct equivalent of DVD Shrink for Linux. I've heard claims that it works under Wine though
Update on my problem: I returned the drive to the store I got it from and got another one. (The other drive scratched my mum's Beethoven piano CD in-store so she's not happy, but she's getting one with a DVD attached.) Anxiously, I installed it and got no CD audio.
I just received my Audigy 2 ZS Platinum and installed it. Again, I tried the CD audio to make sure it wasn't the card and again it played no sound. So I tried it with the S/PDIF CD cable they supplied, and sure enough I got my CD playing! Now listening to track 9 of "From Here On In" by The Living End
So I'm guessing there's a jumper on the drive for Analog or S/PDIF output and it may or may not output both at once.