Went through the process of configuring MDT 2010 for use to deploy Windows 7 and Windows XP. Issue I'm having with the deployment of XP is that it doesn't seem to be using the unattend.txt. What can I look at to figure this out?

Are you talking about the one configured in the Task Sequence itself?

Yes, I can go into the properties and view the sysprep.inf and unattend.txt file under the "OS Info" tab. And Ive verified that the information is correct.

So what's not applying then? You can always take the unattend.txt, rename to winnt.sif, place it in the i386 directory, and try to install from that i386 outside of MDT to see if it works.

I've never personally had any issues with unattend.txt outside of MDT, but anything's possible. Perhaps post the contents here as an attachment?

Nothing is being applied. Asks for key, domain info, PC name... all the stuff that's in the text file.

I actually took a functional WINNT.SIF and renamed it to UNATTEND.TXT. The WINNT.SIF is still in use on a hack job of an unattended install for my workstations so I know the information is valid.

I'll post my unattend.txt file tomorrow when I'm back at work.