This was all taken from just looking at Jeff Tweedy's fingers when he played a part of 
song acoustic on the 2nd CD of I am Trying to Break Your Heart.

There is a capo on the second fret, all chords are relative to that

here it is:

              D                        G                   Bm 
                      E
Theres a magazine called sunset, and a tape machine that won't let

G                            Bb                               
              A
me ever forget this impossible longing for you

       D
Lets take a map across your pillow and

E
breathe the sky in through your window

     G
I'll stay in the middle, and watch your books cave in...


the rest of the song follows that pattern, to find the rhythm u should listen to the 
don't be fooled by the crazy beginning.