---------9--9-----
D------------------
A---7--7-----------    (Repeat several times)
E------------------

(first change)
G------------------
D---------7--7-----
A------------------    (Repeat 4 times then back to above riff)
E---5--5-----------

(second change)
G----------------
D----------------
A---5-----5------    (Repeat a few times)
E------5-----5---

(Brief pause right here)

G-----------------
D-----------------
A---3--3--3--3--3-
E-----------------

-CHORUS-

G-----------------------------------------------
D---------9--12---------------------------------
A---/10---------------9--12------7--10------5---
E----------------10----------8----------7-------  (Right here,

  either ride A string's 7th fret or back to intro riff, listen
  to the song!)

By listening to the song you can get a good idea of where the
parts go.  Right before the crazy keyboard solo thing, the bass
does this little riff, right after the chorus, instead of going
right back to the intro riff:

G---------------
D---------------
A---7--7--------  (Repeat several times,
E---------0--0--    then back to intro riff)