I just picked up a Mac Pro 2.66 dualcore Xeon amidst all the rumors of the upgrade and I must say - I am glad i did. The thing is a beast. Anyway - I want to add an additional optical drive in the empty bay for two reasons. I know from my macbook that the superdrives make it impossible to bypass region protections on DVDs even if you use VLC. Since the macpro does not use that matsushita drive, I might be able to bypass with VLC..anyone know? Anyway, I have tried to insert a new drive in the empty bay but I cannot get the OS to recognize it or open it. I think it may have something to do with the master/slave configuration in the pins. I also wonder if I need to remove the face of the optical drive to get it to fit through the thin opening in the front of the mac.