This uses dropped D tuning  low to hi: D A D G B E

Intro and Chorus Riff (palm mute as you see fit)
E--------------------------------
B--------------------------------
G--------------------------------
D-0---------------3-0------------
A-0-------------2-3-0------------
D-0-0-0-0-0-0-0-2-3-0-0-0-0-0----

The End of the Chorus Riff
E---------------------------------
B---------------------------------
G---------------------------------
D-0-----------------3--3-5--------
A-0---------------2-3--3-5--------
D-0-0-0-0-0-0-0-0-2-3--3-5--------

Lead Fill (sometimes it's played 
with the last part palm muted)
E---------------------------------------------------
B---------------------------------------------------
G---5-7-8-5h7p5---5---------------------------------
D---------------8---7-8-5h7p5---5-------------------
A-----------------------------8---8h10p86-8-5~~~~--
D---------------------------------------------------

Killer Hook (pick clean)
E-------------------
B-------------------
G-------------------
D-------------------
A-------2---3-------
D-0-2-3---3---------

After Killer Hook
E-----------------------
B-----------------------
G-----------------------
D-12--10--8---8--5-3----
A-12--10--8---8--5-3----
D-12--10--8---8--5-3----

Verse (cut the volume knob  --------->      Pre-Killer
Hook at the end of verse
hard before you play this)  volume back up  (make that
vibrato big and sick)
E------------------------------|---------------------------------------
B--2--------2------------------|---------------------------------------
G--1--------2------------------|---------------------------------------
D------------------------------|---------------------------------------
A------------------------------|--------------------2-2----------------
D------------------------------|--------------0-2-3-----3~~~~~---------