Hi, so basically I was trying to install Windows 7 via bootcamp and it wouldn't let me make a partition due to my Hard Drive being so fragmented. So i tired to de-frag it with a number of programs and it's just doing my head in. I have only used 30GB of my 160GB drive, most of it I don't mind loosing. I got a Snow Leopard disk with my MacBook. Could I reformat the HDD and install a fresh copy of Snow Leopard or do i need the original leopard to do this? I'm not too experienced when it comes to this, any help would be appreciated!