For years the mantra has been you have to use sysprep or sidwalker if you make an image of a pc before deploying it to other servers/workstations.  It turns out that is true, but ONLY if it is a domain controller.    Otherwise there is no need, at least according to Mark: http://tech.slashdot.org/story/09/11/04/0040203/The-Machine-SID-Duplication-Myth?from=rss