it would be nice if it actually worked that way, but it doesn't. the documentation in the ref.chm is a nice starting point, but frankly it's outright wrong in some places and doesn't explain well enough in others for example if you use quotes or don't use quotes in certain lines, it messes up the parsing of WINNT.SIF somehow. the ref.chm doesn't explain this and in fact tells you to use quotes on some entries where you can not use them that's the problem i had when i moved my WINNT.SIF from my SP1 CD to my new SP2 CD just SOP for microsoft, IMO Actually I test by making Nero NRG files, Daemon Manager to mount the image, and then using VMWare to test the install - much faster