righto, ive seen a few versions on how to play this, but this is how i think its done 
 
Dropped D Tuning (DADGBe) 
 
KEY 
p = pull off 
 
 
intro: 
e|-------------| 
B|-------------| 
G|-10-10-10-10-| 
D|-10-10-10-10-| 
A|--8--8--8--8-| 
D|-------------| 
 
 
main riff 
e|--------------------|-------------| 
B|--------------------|-------------| 
G|--------------------|-10-10-10-10-| 
D|--------------------|-10-10-10-10-| 
A|--------------------|--8--8--8--8-| 
D|-12p0-10p0-9p0-10p0-|-------------| 
			this chord cuts back in every now and then 
 
 
chorus 
e|-------------------------| 
B|-------------------------| 
G|-------------------------| 
D|-5-5-5-5-5-5-5-5-5-5-5-5-| 
A|-5-5-5-5-5-5-5-5-5-5-5-5-| 
D|-5-5-5-5-5-5-5-5-5-5-5-5-| 
 
 
ending 
e|-----------------------------------------|-----------------------------------------| 
B|-----------------------------------------|-----------------------------------------| 
G|-----------------------------------------|-----------------------------------------| 
D|-8-8-8-8-8-8-8-8-10-10-10-10-10-10-10-10-|-----------------------------------------| 
A|-8-8-8-8-8-8-8-8-10-10-10-10-10-10-10-10-|-----------------------------------------| 
D|-8-8-8-8-8-8-8-8-10-10-10-10-10-10-10-10-|-12p0-10p0-9p0-10p0-12p0-10p0-9p0-10p0---| 
 
e|-----------------------------------------| 
B|-----------------------------------------| 
G|-----------------------------------------| 
D|-8-8-8-8-8-8-8-8-10-10-10-10-10-10-10-10-| 
A|-8-8-8-8-8-8-8-8-10-10-10-10-10-10-10-10-| 
D|-8-8-8-8-8-8-8-8-10-10-10-10-10-10-10-10-| 
 
e|---------------| 
B|---------------| 
G|-7-7-7-7-7--10-| 
D|-7-7-7-7-7--10-| 
A|-5-5-5-5-5---8-| x6 (on last time, finish on the D chord) 
D|---------------| 
 
 
Note: in the main riff, sometimes he hits a D instead of the first 12p0 
 
 
that should be it 
 
Petox