The last time I ghosted a handful of Dells and didn't newsid/sidewalk them they replaced each other on the domain and 'kicked' the other off, so when I was all done, I had one pc on the domain (the last one) and the other 4 had all sorts of weird issues, the pc thought it was on the domain but when you went to compmgmt.msc and tried to enumerate the local accounts it would resolve the domain accts as the sid DOMAIN\111-34-5-667-8-9 (you know the one).
Just my .02 ~ Finally, powerful endpoint security that ISN'T a resource hog! ~ ~ <http://www.sunbeltsoftware.com/Business/VIPRE-Enterprise/> ~