Part 1:
G----------------------------11-1----------
D--2--------2--------22-244-4----4244444444
A-----2-0------2-0-------------------------
E------------------------------------------

Part 2:
G----------------------------
D--2-------------2----454-2-- Play These two parts throughout the song. Listen for the order.
A----2-0-454-0-2---2-0-----2-
E----------------------------

When it goes the the heavy bass part (it is just part 2, just heavier) you end it with this:
G--------------
D--------------
A--------------
E--3---------5-

Then for the last part of the song (you start to play this after you play part 1 for the last time):
G-------------------------------
D-2222------------------------2-
A-----2222-0000-2222-0000-2222--  X2
E-------------------------------

After play that part twice, go into this:
End Part 1:
G----------------------------------
D------------------22222222-------- Play once
A-00000000-22222222--------0000000-
E----------------------------------
End Part with run:
G-----------------------11-22-44-66-88-99-
D------------------22-44------------------
A-00000000-22222222-----------------------
E-----------------------------------------

The last little bit is just the same as End Part 1.