Well...here it goes.
[A]
e|--------------------]
b|--------------------]
g|--------------------]
d|--------------------]
a|-2-0-2-5-2-0-2-0-2--]
D|-2-0-2-5-2-0-2-0-2--](listen to the CD to see how many times you play it)

[B](This part is palm muted)
e|------------]
b|------------]
g|------------]
d|------------]
a|-0-2-2-2-2--]
D|-0-2-2-2-2--](i think you play this 4 times, but im not sure,
listen to the CD to find out exactly how many times you play it.)

[C](This part is palm muted)
e|------------]
b|------------]
g|------------]
d|------------]
a|-0-5-5-5-5--]
D|-0-5-5-5-5--](I think you play this 4 times...)

Then you play part [B] and [C] again. Then you play...

[D]
e|--------------------------------------------------------------]
b|--------------------------------------------------------------]
g|--------------------------------------------------------------]
d|--------------------------------------------------------------]
a|-2---2-x-2---2-x-2---2-x-5--0---2---2-x-2---2-x-2---2-x-3--0--]
D|-2---2-x-2---2-x-2---2-x-5--0---2---2-x-2---2-x-2---2-x-3--0--]
(listen to the cd to figure out how many times you play it)

Anyways, thats how i play it...sounds good to me...later. 

 TOOL AENEMA

h=hammer on
p=pull off
/=slide up
=slide down
s=slap
p=pop
~=hold note

this is in drop D.  just like basically every other one of tools songs.

Intro (0:24)  2x
G---------------------------
D---------------------------
A-----5-----5-----5--------- 
D-2-2---2-2---2-2---2/4-4--4