i am going to install it, and it says what would u like to do, and it says install windows xp as one of the options, if i click it and proceed and install it, would it redo all my drives and memory and totally re-format my harddrive, or will it just install new OS and ask me to reboot and it will look like nothing changed. plz no saying anything like "just dont do it, install vista" because for now im sticking with Xp ok thanks!HEY guys umm...now when i try every option i can do has a blue arrow and they work but the install now button has a green arrow and nothing happens when i click it~!! helpz