G------------------------   Main riff through the whole song. 
D------------------------   Play however many times as the song plays it!!
A-------------4444-6--7-6
E-66666666666------------

G-------------- This is the only part that deviates from the main riff.
D-------------- It is fairly easy to pick up as you listen to the song and is played
A-------2-1-2-1  usually before the main riff starts or the chorus starts (the 
E-2--1--------- chorus is the same as the main riff)