My project for the night was to try to put my new Hitachi 200gb 7200 RPM hard drive in my MBP 1.83 CD. The walk through was easy to follow, but when I turned it on and when I tried to do a clean install OSX it says there is no source disk or whatever, meaning I'm guessing that it did not read the hard drive. Is there any reason that this would happen because of my machine, or could it be a bad drive. I cannot put it in the external enclosure because I am a jackass and bought the kind. Any tips or assistance??? Thanks you very much I am pretty stressed about this. EDIT: I put the old one back in and it works fine.