Drop D tuning, little distortion. Nin style you know.

The riffs in the song go like this.
verse
|------|
|------|
|-33335|
|-----0|

then chorus with a huge boost from guitars
|--------| |--------|
|--------| |--------|
|-33332~-| |--------|
|--------| |-33330~-|

during the chorus at some points the f on the low d string (third fret) is hammed on 
the open string. pretty easy tune. lots of fun to play though.