I just got a used macbook, the 1200 white one, not the entry level one. The machine did not come with the os discs so I tried a fresh install with discs from other machines, macbook pros, black macbooks, none of them work cause it says software cannot be installed on this machine. Do I have to find someone with the exact same configured macbook as me, or is there a way around this? I feel as if there just OUGHT to be a way to get around this. Please help!!