Window 7 Clean Install Using Upgrade Media

Sadly, Microsoft has provided very little information on the Windows 7 upgrade process.  Fortunately, Paul Thurott has shed some light on this and has identified what is possible.  In an article titled "Clean Install Windows 7 with Upgrade Media" on his website Supersite for Windows, Paul identifies 3 methods for perform this clean install  (1) Boot with the Upgrade Setup media  (2) Registry hack, and (3) The good old "double install" method.  Please visit his site for further details.