Hi,
I got a Compaq laptop (mighty fine thing) wich has XP installed on it. With it is a restore cd, so I only backup my important files. The restore cd takes only a short time and then copy back the backup files and you set. You should have that kind of cd to. If not then I recommand (like others did) that once you have a basic installation make a copy from it with Norton Ghost. It will be the same as I describe about the restore cd.
Coder