Im pretty sure this is the correct intro for it

When you play the first section play the e string open each time you play the other 
but stop when you get to section 2 & 3

Section 1

e|---------------------------------------|
B|12-12-12-10-10-10-9-9-10-9-10-9-10-9-10|
G|---------------------------------------|
D|---------------------------------------|
A|---------------------------------------|
E|---------------------------------------|

Section 2

e|-------------------------------------------------|
B|12-12-12-10-10-10-9-9-10-9-10--9-10--9-10--9-10--|
G|-----------------------------11----11----11----11|
D|-------------------------------------------------|
A|-------------------------------------------------|
E|-------------------------------------------------|

Section 3

e|-----------------------------------------------------|
B|12-12-12-10-10-10-9-9-10-9-10--9-10-9-10--9-10-9-10--|
G|-----------------------------11---------11---------11|
D|-----------------------------------------------------|
A|-----------------------------------------------------|
E|-----------------------------------------------------|

e|-----------------------------------------------------|
B|10-10-10-10-10-10-10-10-12-12-12-12-12b--------------|
G|-----------------------------------------------------|
D|-----------------------------------------------------|
A|-----------------------------------------------------|
E|-----------------------------------------------------|