Well, I suppose I'm posting this about 9 years too late, but on Nanci Griffith's great cover of this song, on her "Other Voices, Other Rooms" CD, they are doing this with a capo on fourth fret, in G. The walk downs are the standard C running down through Am (in this case it's that wierd C chord (sus something?)which is the Am with the third string open, then to D. There's the walkdown from G to the Em as well.The rest is pretty straighforward. It's a great tune!!!