I jsut installed a combo drive in my PB 550. It works fine other than the fact that it is not recognized by iTunes to burn to. I have done everything that I can think of (restarting, resetting PRAM, removing and reinstalling iTunes etc) the apple system profiler sees the drive, I can read cds, dvds, and burn from the finder.
os 10.1.2
latest iTunes
384 MB
20 gig
os 10.1.2
latest iTunes
384 MB
20 gig