I dont intend to reinstall XP again if I can help it. I want to keep my original OS , XP on C:\ and put Windows 7 on the new h/d E:\. 2 OS's on 2 h/d's. I dont know yet if my boot manager will handle Windows 7 as well as XP, though it did handle XP and Vista on the same h/d. I uninstalled Vista, didnt like it. Too used to XP now. My buddy said the Trial Windows 7 he has is brilliant and only a small file compared to Vista or XP. Hes upgrading soon too I believe. Im buying the Ultimate edition when its come out. Just hoping it works ok with my system.Thanks for your replies anyway guys and Ill keep you posted. You'll have to bear with me if I dont always make sense with this pc talk. Im 58yrs old and new to the technical side of pc's. I want to do this myself, not ask others to install things for me etc. Got to learn some time. CIAO!!