Intro

G -9-7--7-9--|
D -----9-----|
A -----------|
E -----------|

Verse/Main Riff
G -----------------------------------------|
D ---99999-9-----9-------------------------|
A -7---------7-7---77-5-------5-5-5-5---5--|
E ----------------------7-5-7---------7----|

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

occasionally the verse/main rif may change
G------------7-7----------------------------|
D ---99999-9-----9-7-9----------------------|
A -7-------------------5-------5-5-5-5---5--|
E -----------------------7-5-7---------7----|

or

G------------9-7---7-9----------------------|
D ---99999-9-----9--------------------------|
A -7-------------------5-------5-5-5-5---5--|
E -----------------------7-5-7---------7----|

i think both are used, either way they both work or if u wana keep it simple just use 
main riff over and over for 7 minutes...

laters r kids..