Start: assuming that all nodes share same HW config...
google for "pq magic" or "ghost image" (not scary one :] )
1.make fresh OS install with drivers on first node
2.install all soft required - do not register, neither windows
3.make "ghost image" of that node
4.copy over nodes
5.boot up
6.boring part - register all
7.back up that image
TIP: when copying partition also make "ghost"/invisible one on node hard disk.. this will save you time later when you need to reinstall fresh for speed [quick process from ghost already on disk]