Chords used for the first half:

|-5---4---2---4----|
|-5---5---3---5----|
|-6---4---2---4----|
|-7---6---4---6----|
|-7---7---5---7----|
|-5----------------|

or played alternately:

|-5---7---5---7----|
|-5---9---7---9----|
|-6---9---7---9----|
|-7---9---7---9----|
|-7---7---5---7----|
|-5----------------|

The main guitar riffs in the second half (obviously with some variation, and eventually 
Gtr 1 starts playing the same thing as Gtr 2):

Gtr 1
|--------------------------9-12-9---------------------------------|
|---------------------9-12--------12-9----------------------------|
|----------------9-11------------------9---9-11-13--13-11-9-------|
|-----------9-11--------------------------------------------11----|
|------9-11-------------------------------------------------------|
|-9-12------------------------------------------------------------|

Gtr 2
|----------------------------------15-17-15-----------15--------|
|----------------------------15-17----------17--15h17-17--17----|
|-------------------12-14-16------------------------------------|
|-------------12-14---------------------------------------------|
|-------12-14---------------------------------------------------|
|-12-15---------------------------------------------------------|