My harddrive failed in my 2 month old MBP. I replaced it with a larger 500GB drive. Now when I tried to install off of my restore disk it fails. I presume because the disc is scratched. I purchased the retail snow lepord disc at my local best buy. (10.6) and when it boots it says i must restart my computer and try again. Is there a reason for this? I know 10.6 came out in 2009 and my computer is about a 1 1/2 newer so I assume this is an issue with the drivers? What are my options to get OSX up and running?