I have a 120 GB macbook, 2.1 ghz and 1GB ram and I wanted to set up Boot Camp on it. I plan on upgrading the RAM soon, but I have some questions. 1. How much space does the Mac OS X Leopard take up? I've got 81 GB free from my 120 and I wanted to know how much was already being used by the OS? 2. How high can I upgrade the RAM to? 3. How much does the XP OS take up?