The introduction to this song is a great tune but 6th  
string E needs to be tuned to D. 
 
It goes something like this: 
 
E|-----------------|-----------------| 
B|-----------------|-----------------| 
G|--2--------------|--2--------------| 
D|-2-2--3----0-0---|-2-2--3--24444--0| 
A|0----3-3--0-0-00-|0----3--------33-| 
D|----3----0-------|----3--30--------| 
 
REMEMBER  this is only the intro (riff 1) i sadly don't know the  
rest. 
 
Enjoy!