Alright, this song is kinda all over the place, but I'll give it a shot.

Intro (about 12-13 times)
G--7-7-4------------------4-|
D---------7-4-------4--7----|
A--------------5-5----------|
E---------------------------|

Descending Part
G----------------------|
D----------------------|
A--9-8-7---------------|
E----------------------|

Main Riff (listen to the song to get the timing right)
G-------------------------|
D-------------------------|
A--6-6---6--4--2-2---2--4-|
E------6-----------2------|


This is just a basic outline of the song.  Theres a few little fills and tempo changes 
and there, but its all based aroudn this.  You can just mess with this for an idea on how 
play the song.