I'm getting a MacBook Pro with a 320GB hard drive. I'm thinking about putting Windows 7 on it. I might use it for schoolwork just in case I don't feel like I can be productive on Mac OS X. I might also use it to download movies and stuff like that. So how big of a partition should I make in it? I don't even know how much space the Windows OS itself takes so if anyone could explain that, that would be helpful too!