Ok, I know this is what I want to do so (no disprespect at all, seriously) please dont say I should just purchase it with a bigger HDD. Well, in a few days I am purchasing a macbook and when i get it i want to put a 320 gb Hdd in and then i was thinking, how in the world is this possible when there would be no information on the HDD to boot or have an OS or anything. What am i supposed to do? is there a way to make an exact copy of my hdd image or what. Thanks for the help. I love macrumors forums, people are so helpful.