When you whack the XP disc in, make a partition.....20 gig will be fine as 'C' drive, then make the rest of the disc 'D'.
Then install your clean copy of Windoze on 'c' and keep it really clean- I only allow Windows, the updates and the AV/Firewall progs on my C drive, keeping the D drive for progs, apps and games etc. (In fact I've got two other 500GB HD's that are partitioned separately for this but the principle remains the same.
Thereafter, you can defrag the partitions separately which is nice (and unless you have dual or quad core processors makes it immensely faster to do)
It also makes AV scanning quicker (you can do a section at a time) and it's a piece of pish to backup your installation.
In fact (I should have written this in first) once you've got Windoze installed, fully patched up, AV and Firewall software installed and patched and the printer, tv card and graphics card drives etc done, make an image of the new, clean C drive and save it...then next time you can just use that and have a new fresh install ready in 15 mins
