ok I just put in my leopard dvd on my new mbp. I want to fresh install so I did what you need do and restarted. It hangs at the grey apple...forever. Tried it a few times. Problem is I can't even get back to the current leopard install b/c everytime I restart it it tries to spin the disc and do what it did the first time. I thought it was my 3rd party ram but thats all the ram I got, so I removed 1 to see if it would work with 1 piece, still no luck. idk what to do.