no, just reset the ide controller drivers to the microsoft ones, switch the mobo, boot, windows will ask to be reactivated by phone..... or net..... but i could only do it by phone... it's from dell so it's legit right, you tell an automated voice #'s, it gives more back, voila xp is reactivated, mobo is switched, get rid of old mobo drivers, put in new ones
or a simple answer to first post, i think xp install cd would be what you need for a fresh install..... dunno what a 'dell reinstall disk' contains... as long as you have/know your cdkey