noob question. My macbook is a rev B (Late 2006). i want to upgrade my hard drive for more disk space. Is there some kind of maximum hard drive support they have like RAM or do any hard drive (of same type) work? I believe my current is a 5400rpm 160gb. looking to upgrade to whatever biggest i can find, maybe 320gb 7200rpm. there won't be any problems with getting a 7200rpm right?