Drop-D tuning 

intro/verse riff 1: riff 2: 
G|----------------| 4x |-----------------------| (i think you can fiure out 
D|--3-5-3---------| |---2-3-2-----7-5-3-2-3-| the appropriate time 
A|-5------5-0-----| |-3-------3-0-----------| for this) 
D|------------0-0-| |-----------------------| 

ok, still with me? good. ok next is i guess the pre-chorus, which goes: 

G|---------------| -a bunch of times, |-----------------| 
D|---------3-----| then this this |-----------------| 
A|-----3-5---5-5-| last time - |-----3-5-----3-5-| 
D|-5-7-----------| |-5-7-----5-7-----| 

then the chorus 
G|-----------------------------------| -2x then- |---------| - the last time. 
D|-----------------------------------| |-------5-|(i don't really care 
A|------------------5555555555555555-| |---5-----| if that's right) 
D|-8888888888888888------------------| |-5---5---| 

then that other part. i don't know what to call it. by the way > after a note 
means i didnt feel like counting all the notes. just strum it a lot. 
G|-------------------| 2x 
D|-------------------| 
A|----------------5>-| 
D|-8>-77-55-33-55----|