So, is been 13 months since I purchased my macpro, and since then I have added some extra HDDs. For those two reason I want to re-install OSX. So tonight I put my Disc 1 of OSX into the drive, rebooted and held down C. After the apple logo screen disappears I get a blue screen. The blue screen stays like that until I manually power off. This is the same situation when I try to install off the disc when in OSX. Anyone have any ideas?