Josh Wilson - Pushing Back The Dark chords

Capo 7

  G    D   Bm    A
-2-3---2---0-1---0
-3-3---3---3-3---2
-0-0---2---4-4---2
-0-0---0---4-4---2
-x-x---x---x-x---x
-x-x---x---x-x---x
[ Tab from: http://www.guitaretab.com/j/josh-wilson/384537.html ]
These chords are repeated throughout the song.  The changes on the high E string 
during the G and Bm chords are hammered on.  

Listen to the song to get the rhythm.  
When you count 1-E-&-A-2-E-&-A-3-E-&-A-4-E-&-A
1st measure: G starts on beat 1, D on beat 3-e.  
2nd measure: Bm starts on beat 1, A on beat 3-e.