This is the lead guitar that plays the eight chords during the song
Drop D (Not really necessary you can play it in E) 

Intro
 e|--------------------------|
 B|--------------------------|
 G|--7--------777777777777---|
 D|--x--------xxxxxxxxxxxx---|
 A|--5--------555555555555---|
 D|--------------------------|
 pm.           .........(gradually release palm muting)

 e|--------------------------|
 B|--------------------------|
 G|--6666-7777-79-77777777---|
 D|--xxxx-xxxx-xx-xxxxxxxx---|
 A|--4444-5555-57-55555555---|
 D|--------------------------| x4

Verse
 e|--------------------------|
 B|--------------------------|
 G|--6666-7777-79-77777777---|
 D|--xxxx-xxxx-xx-xxxxxxxx---|
 A|--4444-5555-57-55555555---|
 D|--------------------------|x4 (Dont play the D in the 4 time)

Chorus 
 e|--------------------------------------------------|
 B|--------------------------------------------------|
 G|-11111111-99999999-6666-7777-79-777712121212------|
 D|-xxxxxxxx-xxxxxxxx-xxxx-xxxx-xx-xxxxx-x-x-x-------|
 A|-99999999-77777777-4444-5555-57-555510101010------|
 D|--------------------------------------------------|(Its 11, 10 and 12)

 e|--------------------------------------------------|
 B|--------------------------------------------------|
 G|-11111111-14141414-6666-7777-79-777712121212------|
 D|-xxxxxxxx-xxxxxxxx-xxxx-xxxx-xx-xxxxx-x-x-x-------|
 A|-99999999-12121212-4444-5555-57-555510101010------|
 D|--------------------------------------------------|(Those are 12 and 14) 

Play verse x2 and Chorus x4 but finish on D and let ring


Bridge (Not sure but it sounds pretty good for me)
 e|-0~-----0---0h2p0---0~----------------------------|
 B|------3---3-------3-------------------------------|
 G|--------------------------------------------------|
 D|--------------------------------------------------|
 A|--------------------------------------------------|
 D|--------------------------------------------------|Repeat it through the whole bridge 
 
Outro
 e|------------------------------|
 B|------------------------------|
 G|--6666-7777-79-777712121212---|
 D|--xxxx-xxxx-xx-xxxxx-x-x-x----|
 A|--4444-5555-57-555510101010---|
 D|------------------------------|

Play this x4 and after Garreth says Wooohh! Play that

 e|------------------------------|
 B|------------------------------|
 G|--6666-7777-79-777714141414---|
 D|--xxxx-xxxx-xx-xxxxx-x-x-x----|
 A|--4444-5555-57-555512121212---|
 D|------------------------------|

Hope you like it :)
Any comments or corrections at juandavg92@hotmail.com

Key:
 pm. = Palm Muting
 ~   = Let Ring