I have recently published a whitepaper on the Debug Diagnostic Tool v1.1 (Debugdiag) at the following location in the download center.
The whitepaper gives a detailed description of the tool. It explains the main components of the tool and their usage. It also provides Walkthroughs on how to configure the tool to get the right data and how to analyze it. Debug Diagnostic Tool v1.1 is currently available from this Microsoft web site.