The song itself is in D Standard, but it sounds better to me and it much easier to play in Drop D.

Tuning: Drop D

Intro:
E|-----------------------------------------------|
B|---7-----------7-------------------------------|
G|-----7-6---6-7---7-6---6-7----7----------------| xLOTS.
D|---------7-----------7-------------------------|
A|-----------------------------------------------|
D|-----------------------------------------------|

Basically, you play that in the Intro, Choruses and Outro.

Verse:
E|-----------------------------------------------|
B|-----------------------------------------------|
G|-----------------------------------------------|
D|-0-0-0---0---0---0-0----5-5-5---5---5---5-5----|
A|-0-0-0---0---0---0-0----5-5-5---5---5---5-5----|
D|-0-0-0---0---0---0-0----5-5-5---5---5---5-5----|

E|-----------------------------------------------|
B|-----------------------------------------------|
G|-----------------------------------------------| all x2
D|-9-9-9---9---9---9-9----7-7-7---7---7---7-7----|
A|-9-9-9---9---9---9-9----7-7-7---7---7---7-7----|
D|-9-9-9---9---9---9-9----7-7-7---7---7---7-7----|

Chorus = same as Intro

Verse again,
Chorus again,

Bridge:
E|-------------------------------------------------|
B|-------------------------------------------------|
G|-------------------------------------------------|
D|-------------------------------------------------|
A|-2---4---5----0--------------0--2----4---5--0----|
D|------------------5------4---------------------5-|

Breakdown:
E|-------------------------------------------------|
B|-----------------7-----------------------7-------|
G|-------------------7-6---------------------7-6-7-|
D|-----------------------7-------------------------|
A|-000-000-000-000---------000-000-000-000---------|
D|-000-000-000-000---------000-000-000-000---------|
   ... ... ... ...         ... ... ... ...

E|-------------------------------------------------|
B|-----------------7-------------------------------|
G|-------------------7-6---------------------------|
D|-----------------------7-------------------------|
A|-000-000-000-000---------000-000-000-000---------|
D|-000-000-000-000---------000-000-000-000---------|
   ... ... ... ...         ... ... ... ...


Aaaaaaand, Chorus again, twice.
The ending's just a cross between the chorus and the breakdown, not difficult to work out at all!