Hi, I'm considering to switch my gaming that I do on WoW from OSX to XP or something of the sort for better performance. I'm currently using a mid 2009 Macbook Pro 13'. 2.26 Core 2 Duo w/ 4 gig Ram & 7200 rpm seagate momentus xt hd. I was wondering if I would benefit and even if it's possible to setup an external HD with windows XP and just boot from that to play WoW. Would I notice an improvement?