My sincere apologies if these questions have been asked before but i had a look and i couldn't find the answers. I just got the mbp today and in the box was the Snow Leopard cd. I installed it but it took up 15GB of space. Is that normal? Would it make a difference if I did a clean install? How could i do that? - sorry, i've had my ibook G4 for 5 years and the mbp is very different so feel like i'm new to mac all over again! Just one other question - i have the laptop charging now, should i calibrate it? Is that where i charge it to 100% and then just let it drain it completely and then charge it up again? The battery in my old ibook was shot to hell so don't want to do that again. Gonna be good with this laptop Any help would be much appreciated!