Until The End Tab

This song is pretty much one riff, which I'm almost 100% sure is right. I'm doing it 
memory, though, so there could be a few mistakes. This track is performed by Tom Morello 
the psuedonym the Nightwatchman at the Axis of Justice concert.
[ Tab from: http://www.guitartabs.cc/tabs/t/the_nightwatchman/until_the_end_tab.html ]
Acoustic Guitar                                                   Key:
Standard Tuning                                                   h=hammer-on
Capo 2nd fret                                                     p=pull-off
                                                                  ~=hold note
      Bm*      D       Db
     (Am)     (C)     (B)
e-----0~-------1~---------------------|
b-----1~-------2~------0~-------------|.
g-----2~-------0~------0~-------------|
d-----2-2-0----2~------x--------------|
a-0-0-0------3-3-3-0-2-2~-----0h2p0h3-|.
e------------------------0h3----------|

*Chords in parenthesis show open uncapoed forms, while the chords above show the actual 
chord.