Ok here is the main riff i think, i haven't figured out the rest yet..... this is my 
tab....^^

Okay here is the intro, it's better to play it with barr? & fingerpicking in the beginning:

                   e-------------------------------------------------|
                   b-----------------------7----------5--------------|
                   g------------8--------8----------6----------------|
                   d----------9--------8----------6------------------|
                   a-------9---------6----------4--------------------|
                   e----7--------------------------------------------|


                   e-------------------------------------------------|
                   b-----------------------7-------------------------|
                   g------------8--------8------------6-----5--------|
                   d----------9--------8------------7-------6--------|
                   a-------9---------6------------7---------6--------|
                   e----7-----------------------5-----------4--------|

Okay now the riff:
                                                                                         
                > strum this part
                   e----7-------------6----------4-------------------|
                   b----7-------------7----------5-------5-----------|
                   g----8-------------8----------6-------7-----------|
                   d----9-------------8----------6-------6-----------|
                   a----9-------------6----------4-------7-----------|
                   e----7-------------6----------4-------------------|


                   e----7-------------6----------5-------4-----------|
                   b----7-------------7----------5-------4-----------|
                   g----8-------------8----------6-------5-----------|
                   d----9-------------8----------7-------6-----------|
                   a----9-------------6----------7-------6-----------|
                   e----7-------------6----------5-------4-----------|

So, that's all i found out^^ Have fun!