Hello, I've been trying to reinstall Snow Leopard on my Macbook Pro, but I'm running into a bit of a problem. My MBP will read the Snow Leopard dvd fine when it is already booted from the hdd (which boots up perfectly, minus some sluggish-ness, hence the reinstall). However, when I try to boot from cd (via either holding 'C' while restarting, or opening the Snow Leopard disc options, clicking Utilities, and clicking Restart), I get the gray Apple logo screen. I can hear the disc trying to be read, but then it dies down, nothing happens for a while, and then the fans start to blast on overdrive. While the fans are screaming at me, the gray Apple logo just taunts me until I have to force reboot and eject the disc. I tried using the same disc on my family's iMac, and it worked fine. It was read perfectly while already booted on the hdd, and it was able to boot from the disc and get me to the clean install menu. My gut is telling me that this is an optical drive issue, but I wanted to ask here, since I haven't had any problems with my optical drive before. Some other notes: 1. I have booted from this same install dvd once before. 2. This is a retail version family pack install dvd. Any thoughts?