I think this song's played on a five string upright bass. But if you're like me and just 
a four string electric bass, you put it in drop D and play it like this:

G|---------------------------------------------------------|
D|-----1-----1------------1-----1------------2-----2-------|
A|---1-----1-------1----1-----1-------1----2-----2------2--|
D|-1-----1-----x-1----1-----1-----x1-----2-----2-----x-2---|

G|--------------------|
D|-----2----2-------*-|
A|---2----2-------2-*-|
D|-2----2-----x-2-----|

And if you have a five string, play it like this:

G|-------------------------------------------------------|
D|-------------------------------------------------------|
A|-----6-----6-----------6-----6------------7-----7------|
E|---6-----6-------6---6-----6-------6----7-----7------7-|  etc.
B|-4-----4-----x-4---4-----4-----x-4----5-----5-----x5---|

Well, that's it. It really sounds much better on an upright, but an electric will do. 
is played through the whole song, but it's better if you ass some things to it, just be 
and enjoy.
~Love, Dallas~