Ok, so there's really only two riffs in the song. So here we go...

G--------------------------------------12------------------------------|
D-----12---------------10-----------------12---------------------------|
A--------12---------------10--------10-------10 (10)-------------------|
E--10--------10--(10)8--------8-(8)------------------------------------|

This riff is really up to interpretation. Here's how I play it...
G-x12/14-12--------------------------------------------------------|
D-----------14--12-14----------------------------------------------|
A---------------------12-x-----------------------------------------|
E------------------------------------------------------------------|

Then there's the other riff...
"we're primed and we're ready...to go toe to toe w disease....  strum
G-------------------------------------8-----------------10-------121212----|
D---12-----------15------------10------8------12----------10-----121212----|
A-----12-----------15--------10------6--6(6)----12-----8----(10)-101010----|
E-10----10(10)-13----13(13)-8----8(8)-------10----10(10)-------------------|

Thats pretty much it! enjoy its such an overlooked great song.