I am upgrading my celeron system with a p4 motherboard. The existing system was an Emachines and the original operating system was Windows ME. I had already upgraded the operating system to Windows XP and loved it. My concern is that the original operating system is on RESTORE Cd's and I was not supplied with an original Windows ME cd. I am planning on installing a new hard drive as well. What would be the best procedure to follow so that the Windows XP Upgrade will recognize that I have a valid registered copy of Windows ME to qualify me for the upgrade? Thanks for any suggestions or help!