As the title suggests, I want to dual boot Win7 and WinXP. I have Windows 7 installed already. So can somebody explain to me? Umm OK, i think i know what to do, but am i correct just to be safe? Shrink volume C: and give the partition 20GB Turn off comp making sure installation disk is in ^^ Turn on comp and install XP (OEM (full OS) disk onto the partition. but how do i install onto the partition? would it ask me when i am installing?