Hello, im bored of xp, and i have an iso of the "rtm" from late july. which version should i use? ultimate seems kind of bloated with processes, so i run kind of slow.. my specs: MSI 7350 motherboard 2.56Ghz Core 2 duo Wolfdale E7200 2 gigs of ram radeon x600 128mb PCIE vid card 40 gig hard drive and also, how do i make it so i can select which version i want when i open the setup? thanks, -James