Windows 7 doesn’t install using MDT yet. I tried yesterday to install to my computer and it failed out with an unattend.xml error. I am not surprised but a little disappointed. The image imports okay, calls itself Windows Vista though in MDT (MDT not programmed to recognize the new version) comes up with the proper version number and all the editions on the CD like Windows Vista did. it starts up on the right track, but fails later on applying the image.
My next attempt is going to be installing Windows 7 from WDS, (Windows Deployment Services) which I am guessing will work fine and I won’t apply an unattend file but manually answer all the questions. I’ll see what happens and post the results back here.