I've been out of the techy side of Windows for a long time now and was just wondering what size to make by Windows partition when my iMac arrives? I'll be doing all I can in OS X and using XP for the odd program which still isn't Mac supported. Apart from that, I'd like to play the odd game too - HL2, PES5, BF2 etc. How much does the average XP & boot camp install come to? Would 40Gb be more than enough or is that overkill? Can you re-size the partition at a later date without having to reinstall? Thanks!