Not 100% but, its a start. Post an edited or corrected version if you can.

Intro/Verse/Prechorus:

(Listen for Timing)

      A    C#m   G   Bm
------5-----4----3----2-----------------------------|
------5-----5----3----3-----------------------------|
------6-----6----4----4-----------------------------|
------7-----6----5----4-----------------------------|
------7-----4----5----2-----------------------------|
------5----(4)---3---(2)----------------------------|

 Intro: w/ Distortion
 Verse: w/ Distortion
 Pre-Chorus: Clean Reggae upstroke (Hold the G chord, Don't go to the B on the last one)


Chorus:
      D            A#   G