G--------------------------------------|
D--55555555-33333333-7777777788888888--|
A--------------------------------------|
E--------------------------------------|

G--------------------------------------|
D-5 x16---3 x16---7 x16--5 x16---------|
A--------------------------------------|
E--------------------------------------|

G-------------------------------------------------------|
D---55555---55555----33333333-77777777-5555555555555555-|
A--------333-----333------------------------------------|
E-------------------------------------------------------|

I'll tab out the variations seperately but these are the main riffs

http://www.youtube.com/watch?v=frI6t7RHUXI
this guys cover on youtube is the best, listen to him to get the timing