I only know a little. Here goes
Heresy off of Pantera's Cowboys from Hell album

I--------------------------------------------------------------------I
I--------------------------------------------------------------------I
I--------------------------------------------------------------------I
I--------------------------------------------------------------------I
I--------------------------------------------------------------------I
I--5--5--5--4--4--4--4--4--4--3--3--3--3--3--2 3/4--2 3/4--2 3/4--0--I

  [-------------------------------------------------------------][-]
                  NATURAL HARMONICS                              P.M.

Notes: Listen to the album to get the rhythm,kinda a gallop. The 2 3/4 is 
all most at the 3rd fret just slightly behind it. P.M.= palm mute of course.
Later. If anyone knows the rest it would be cool if you posted it.C-YA
Comments,remarks or crude thoughts to me at: 
[email protected]

Date: Wed, 26 Mar 1997 21:58:48 -0500 (EST)
From: "Cynthia A. Stilwell" 

TAB: "Heresy" by Pantera from the album "Cowboys From Hell"
Date: 3/26/97
This is another part of the song that wasn't on the web already.  If anyone
has the riff before the chorus, please post it.  Thanks to Jason Wyatt for
getting me going on this one. Crank your amp, scoop the mids, and just let
loose! 

After harmonics in intro (Also chorus riff
    |-------PM------|      |--------PM-------|
e---------------------------------------------------|
B---------------------------------------------------|
G---------------------------------------------------|
D---------------------------------------------------|
A---------------------4/5~---------------------4/5~-|
E-0-01100-01100-01100-2/3~-0-01100-01100-01100-2/3~-|
(Play 8 Times, I Think)

Next riff
  |--------PM---------|
e-------------------------------------------|
B-------------------------------------------|
G-------------------------------------------|
D-------------------------------------9-----|
A---9---8---6/8/9---8---5/6/7---------7---5-|
E-0-7-0-6-0-4/6/7-0-6-0-3/4/5-0---------0-3-|
Play 4 times, 4th time replacing last 4 notes with end part, then play this:

Verse riff
  |-----------PM------------|
e---------------------------------|
B---------------------------------|
G---------------------------------|
D---------------------------------|
A-----------------------------4/5-|
E-0-0-0-0-0-0-0-0-0-0-0-0-0-0-2/3-|

2nd part
  PM      PM      PM      PM       PM      PM      PM      PM
e------------------------------------------------------------------|
B------------------------------------------------------------------|
G------------------------------------------------------------------|
D--------------------------------------75-----75-----75-----75-|
A-----75-----75-----75-----75--0-0-53-0-0-53-0-0-53-0-0-53-|
E-0-0-53-0-0-53-0-0-53-0-0-53----------------------------------|
Play verse riff twice, then some other riff, then 2nd riff, then verse riff
twice again.