MastaVR6

I would suggest upgrading to MDT2012 and re-evaluate your deployment. Use a sysprepped image (include all Core NB/SB HDC drivers) uploaded with ImageX into a WIM file. Build a WinPE 3.1 image and include your XP.WIM as an added file in the resulting WinPE 3.1, burned to a DVD. this link covers most of what you need: brianleejackson.com/tag/sysprep

When performing Sysprep captures, removing the system from the domain is important as the SID is recreated when the system is added to the domain. Preventing a duplicate SID is as simple as renaming PC's as they are deployed, and added to the domain.