This song either has to be in drop-D tuning or it is played starting on the 5th fret of D.  I believe he plays in drop-D tuning. 

Intro Pt. 1          Intro Pt. 2
G------------|-----------------------------------------|
D------------|-----------------------------------------|
A------------|----------55555550-222-4-000-2-----------|
d-5555-4-2-4-|-00000000----------------------5555-4-2-4| x 2

Verse
G-----------------------------------|
D-----------------------------------|
A-----------------------------------|
d-0000000000000000-5555555555555555-| x 4

Prechorus
G---------------------------------------------|
D---------------------------------------------|
A---------------------------------------------|
d-222222-4h55555555-222222-4h5555555555555555-| 

Chorus    (Part A & B 3 times; Part A & C last)
          A               B	                   C
G-------------------|--------------------|---------------------------|
D-------------------|--------------------|---------------------------|
A-------------------|--------------------|---------------------------|
d-0-002-22-55555555-|0-002-22-55-44-55-4-|-0-002-22-5555555555555555-|

Intro Pt. 2 x 2
Verse x 4
Prechorus
Chorus
Bridge

G--------------------|
D--------------------|
A--------------------|
d-0000/2222/55555555-| x 4

Chorus
Intro Pt. 2 x 2