Many of you remember the excellent presentation Tanya did at DDC on using the WDK build environment.
The whitepaper she created to expand on that talk is now available on WHDC at:
http://www.microsoft.com/whdc/DevTools/WDK/WDK_Build.mspx
This paper has much good info in it. Thanks to Tanya for her hard work in making this available. Also thanks to Liz Hunt who edited the paper.