Intro:
E|--------------------------------|
B|0--0-0-0-0-0-0-0-3------3---0---|
G|--------------------2-2---2-----|
D|--------------------------------|
A|--------------------------------|
E|--------------------------------|
E|--------------------------------|
Riff 1:
[ Tab from: http://www.guitaretab.com/n/nelson-willie/13220.html ]
E|-------------------0------------|
B|0--0-0-0-0-0-0-3-3---3-3---3---0|
G|-------------------------2---2--|
D|--------------------------------|
A|--------------------------------|
E|--------------------------------|
Riff 2:
E|--9--9--9--9--------------------|
B|77--7--7--7--7------------------|
G|--------------------------------|
D|--------------------------------|
A|--------------------------------|
E|--------------------------------|
For the verses, play Riff 1 and at times Riff 1 followed by Riff 2, then back to Riff 1 again... Vaggs.