I see there's already a tab of this, but this is my version. The main difference is that 
it is much easier to play it, and it sounds better too.

Part 1

E|----------------------------------------------------------|
B|----------------------------------------------------------|
G|-4-4-6-66--4-4-6-66--4-4-6-66-----------------------------|
D|-2-4-6-66--2-4-6-66--2-4-6-66----2------------------------|
A|-2-2-0-00--2-2-0-00--2-2-0-00--2--2-----------------------|
E|-------------------------------2---2-4--------------------|

Part 2
(you can also play individual notes from the chords for variation)

E|----------------------------------------------------------|
B|----------------------------------------------------------|
G|----------------------------------------------------------|
D|-7----11---7----11-9--------------------------------------|
A|-x----x----x----x--x--------------------------------------|
E|-5----9----5----9--7--------------------------------------|

E|----------------------------------------------------------|
B|----------------------------------------------------------|
G|----------------------------------------------------------|
D|-7----11---7----11-9--7----11---7----11-9-----------------|
A|-7----11---7----11-9--7----11---7----11-9-----------------|
E|-5----9----5----9--7--5----9----5----9--7-----------------|

E|----------------------------------------------------------|
B|----------------------------------------------------------|
G|-9----13---9----13-11-9----13---9----13-11----------------|
D|-7----11---7----11-9--7----11---7----11-9-----------------|
A|-7----11---7----11-9--7----11---7----11-9-----------------|
E|----------------------------------------------------------|

Part 3
Ok, here's where we use open strings to play what would otherwise be a very difficult riff.

E|----------------------------------------------------------|
B|----------------------------------------------------------|
G|----8---8---8---8-----------------------------------------|
D|-11--11--11--11------11---11---11-------------------------|
A|-0-----0---0---0--11---14---14---14-14--------------------|
E|------------------0------0----0----0--0-------------------|

And finally, the ending:

E|----------------------------------------------------------------------|
B|----------------------------------------------------------------------|
G|-6----6----6----1----2----6----6----6----6----1----2----6----2--------|
D|-7----6----7----2----4----6----7----6----6----2----4----6----4---6----|
A|-7----4----7----2----4----4----7----6----4----2----4----6----4---6----|
E|-5----4----5----0----2----4----5----4----4----0----2----4----2---4----|