I have always installed Snow Leopard on my machines from an external hard drive partition - I image the SL disc, then restore the image to the partition. It has always worked great and been much faster than installing via disc. I've also gone the optibay route on this machine, so I no longer have the disc drive. I could have the drive sent to me (it's with my stuff in CA), but I'd rather just resolve this somehow. So I just bought a new hard drive for my core i5 MBP that I want to format and insall SL on cleanly. For some reason, installing from the SL image partition is no longer working. When I hold down option upon startup, the Mac OS X Install partition comes up, but when I select it, the computer stays on the apple gray screen. I have tried formatting and restoring the image, it doesn't work. Does anyone have any ideas? Has something changed? Or is there another way I can install SL cleanly on my new drive? I do have a 2.5" enclosure, as well as an external drive. Any help is greatly appreciated!