I just got my first mac yesterday, it's pretty shweet. 4gb ram, 512mb gfix card, 7200rpm HD. Anyways, I tried installing windows vista 64. My friend has the previous model macbook pro (got it right before the new ones came out) and was able to use this vista install disk fine. I partitioned my HD, stuck the dual layer dvd in and the superdrive kept trying to read it, wouldn't spit it out until about 3 minutes later. What's the deal here? I also tried to stick a burned leopard dual la yer disk in there and it wouldn't open either. Also can macs only run vista in 32bit? Because my friend installed this disk on his, and when he goes to personalize settings it says 32bit, yet I'm certain that it's 64bit vista.