I think this is what Nielson plays at the start of this great and fun song.
Capo on 3.

Start of the song:
e---------------------------------------|
b---------------------------------------|
g-------------------0------0------------|
d---------------0-2--0-0h2--------------|
a-0h3-0h3-3---3------------------0h2----|
E---------------------------0-2-3----0--|

0.56 He plays a variation:

e--------------------------------|
b--------------------------------|
g------------0------0------------|
d--------0-2--0-0h2--------------|
a-3----3-------------------2-----|
E---------------------0-2-3--0---|

1.50 he plays this variation:

e------------------------------------------|
b------------------------------------------|
g-------------------0---------0------------|
d---------------0-2--0----0h2--------------|
a-0h3-0h3-3---3-----------------------2----|
E-------------------------------0-2-3---0--|

Enjoy!

Iain