Main Riff (let that open note ring)
E|-------------------|
B|-------------------|
G|-------------------|
D|-/7-5--------------|
A|--0---5/3-5-5-3p0--|
E|-------------------|

Throw these chords in at the end of every other main riff thats played.
Also they're used to kick the song off.
E|-------|
B|-------|
G|-5--7--|
D|-5--7--|
A|-3--5--|
E|-------|