Todd,
I saw that program on the History Channel as well! In fact, I have that one and the episode about William Wallace on DVD, and would be happy to *illegally* burn some copies! ;) An interesting fact about how R. McGregor got the name "Rob Roy": It was anglicised from the Gaelic Raibert Ruadh, or Red Robert because he had red hair, which darkened to auburn in later life. Just a useless trivia fact that I was reminded of when I saw this thread...
~Sav