okay, so the main riff goes 
e-------------------------  
B-------------------------  
G---0-----------------4---  
D--0-0----4-----4----4-4--  
A--------0-0---4-4--2-----  
D-5-----0-----4-----------  
 
after a while the piano does some chords which you can do by... 
 
e-3~----2~---------------- 
B-3~----3~---------------- 
G-0~----2~------------4--- 
D-0~----4~------4----4-4-- 
A-0~----0~-----4-4--2----- 
D-X-----0~----4----------- 
 
OR, you could play in normal tuning with the following four chords 
G  3 2 0 0 3 3 
D  X 0 0 2 3 2 
F# 2 4 4 3 2 2 
Bm X 2 4 4 3 2 
 
and just bash those out repeatedly...