Put he XP disk in and restart your computer.
In the bios change the start up to cd-rom.
when xp restarts...it will say "press any key" to start CD.
push "F8" to agree
and re-partition "aka" format with in xp
Make sure you read everything. Do no onstall xp over exisiting OS.
From here it is all automatic
Hope this helps,
SpyCat:D