Hi: Would someone be able to walk me through, or point to a reference that will help me in my exact situation? I have an existing computer with XP on it (dedicated O/S hard drive), but am not ready to build a new machine quite yet. I got my hands on a Windows 7 disc ("OEM for system builders") and want to transition over to it. From there, I have no idea what to do. Perhaps the Windows 7 is disk smart enough to know what I need done and it will take care of it all for me? Or do I have to format stuff, etc. Thank you in advance!