when transitioning to vista i was able to use a lot of vista drivers for xp as well for people who wanted to downgrade. also found xp drivers a lot by looking for the smaller pieces i needed. rather than looking at mobo maker for drivers for the lan, i would look at the actual lan chip used and go to that manufacturers site. they usually had xp drivers and they worked fine when the mobo maker did not have any.
just a few tips i had to figure out during the transition.