n the intro there is a crunchy distortion over the guitar's feedback
G|-----------------------|
D|-----------------------|
A|-----------------------|
E|-2----3----2----0----0-|

the second time he plays it, there is a use of a whammy bar at the end. i 
use my whammy pedal on my digetech processor and set it to bend dowm one 
octave and it sounds good.
here's the variation
   S    S    S    S
G|--------------------------|
D|--------------------------|
A|--------------------------|
E|-2----3----2----0///-0-|

then there is the main riff and thats all there is to the song.
the one already posted is
G:|--------4-5-7---543---4-5-7--|
D:|*-------4-5-7---543---4-5-7-*|
A:|*-----------------------------*|
E:|--3-2-0-------0-------0--------|

but i think it sounds good like this (also its easier to play)
   S S S V ^ V   V ^   V ^ V
G|-------5-6-7---5-4---5-6-7-|
D|-------5-6-7---5-4---5-6-7-|
A|---------------------------|
E|-3-2-0-------0-----0-------|