Actually it is ProductID="XXXXX-XXXXX-XXXXX-XXXXX-XXXXX" for Windows 2000 and XP until Service Pack 1. It becomes ProductKey="XXXXX-XXXXX-XXXXX-XXXXX-XXXXX" with XP SP1 and later XP Service Packs. It runs fully unattended as I need but it shows a different CD Key when I run the Magical Jelly Bean. I believe I found an entry that says when I change the last three digits for ProductID in SETUPP.INI to 270 from 000 that it installs without a serial number. With that being the case then it may be that when the cd install it then makes an entry of a default serial number and it puts an entry in the registry for the ProductID that contains 270 in it. By the way I have a retail disk. Thanks. I'm using the Magical Jelly Bean. That's how I found that the CD Key is not the same as the one in my WINNT.SIF.