I'm pretty toasted atm.

http://dc412.org/unattend.php it's for Vista but meh you should be able to work it out. For the product key don't punch in a valid 1. Usually googling a key and using that for the creating will work, then once rolled out a batch script should be easily enough to code out to automagically swap to your valid key/s

If not check out http://www.msfn.org/board/forum/167-...server-2008r2/