virtualizing a Windoze install

[Howard Coles Jr.]

Ladies and Gents, I have Windoze Vista installed, on one laptop, and Windoze 
XP, on another.  I vaguely remember reading something about running that 
physical install as a virtualized guest in Linux (eliminating the need to dual 
boot).  I remember reading an article about the license key activation and how 
to avoid having to activate it each time you switched from running in a 
virtual session and a physical session.
The question is, how?

-- 
See Ya'
Howard Coles Jr.
John 3:16!