I'm pretty sure the bass follows the organ in this song.

G|----------------|
D|-----2-2-0------|     x4
A|-3-3------------|
E|----------------|

G|----------------|
D|-3-3-3-2-0------|     x2
A|----------------|
E|----------------|


G|----------------|
D|-----2-2-0------|     x2
A|-3-3------------|
E|----------------|

It might go back to the second part here but i think it goes to this..

G|-------------------------|
D|-------------------------|
A|-------------------------|
E|-3--3--3-3-3-2--2--2-2-2-|


G|-----------|
D|-----2-2-0-|
A|-3-3-------|
E|-----------|

And theres all the parts for the song.