one the * parts use a metal slide.
This isnt the whole song, i'm just adding more than i've seen on other versions.

key:
s\___slide
b____bend
*____metal slide
p____pull off
t____play w/ thumb

   G           G  use slide    G might be a G7, try it!
 t           t     ~~~~~~~~
---3-----------3--------------             -3--           ---|
---3-----------3--------------             -3--           ---|
---4-----------4--------------             -4--or just G5 ---|
---5-----3-----5--*3p0-3s\5*--             -3--           -5-|
---5-3s\5------5--------------             -5--           -5-|
-3-3---------3-3--------------             -3--           -3-|

then while he sings he just plays that 1st lick (hammered on):
---3-------------3---------------------------|
---3-------------3---------------------------|
---4-------------4---------------------------|
---5-------3-----5------3--------------------|
---5--3h5--------5-3h5-----------------------|
-3-3-----------3-3---------------------------|
repeat till he stops singing then do the second part of the intro:

---3------------|
---3------------|
---4------------|
---5------------|
---5-*3p0-3s\5*-|
-3-3------------|

then:

-----3--------------6b-------------------|
-----3--6b-------------------------------|
-----4-------(0)-5-----------------------|the (0)'s are very faint,
-(0)-5-------(0)-5-----------------------|more of a pause really.
-(0)-5-------(0)-3-----------------------|
-(0)-3-----------------------------------|

~you could play 11 on the B string instead of the 6, but Dan doesn't.

I just came back in to edit this after watching the DVD.
-the begining he plays the bass sounding G with his thumb and its more like:
  t
 ---3----------------------|
 ---3----------------------|
 ---4-----3----------------|etc.
 ---5-3h5------------------|
 -3------------------------|