Building a USB Drive to Store USMT 4.0 Files and Simple Commands

All the steps and commands are listed here :

http://technet.microsoft.com/en-us/library/dd940094(WS.10).aspx

Using USMT to migrate Users from Win XP to Win 7

http://technet.microsoft.com/en-us/library/dd560801(WS.10).aspx

Understanding the moving parts inside Windows

Follow this article :

http://technet.microsoft.com/en-us/library/cc768129.aspx

and this one too :

http://en.wikipedia.org/wiki/Architecture_of_Windows_NT

and finally something on HAL replacement for windows XP :

http://www.myitforum.com/articles/47/view.asp?id=8997