The intro to this song is so much easier to play done in Drop D than standard, and I'm 
the rest of the song fits too (I just haven't got round to figuring it out yet).

E|---------------------------------|
B|---------------------------------|
G|---------------------0-----------|
D|-----7-------7---------------2---|
A|---7---7---7---7---3---3---0---3-|
E|-7-------9-------3-------0-------|

And just repeat that pattern whenever you hear that riff :) enjoy!