Drop D Tuning. Minus the feedback, and the little intro (which may or may not be
played on a keyboard, but could easily be picked up by ear on guitar) this is really
all the guitar does during the song.

E|---------------------------------|
B|---------------------------------|
G|-----------------------------5-5-|
D|-1-1--1--1-1--1--5-5-5-5-3-3-5-5-|
A|-1-1--1--1-1--1--5-5-5-5-3-3-3-3-|
E|-1-1--1--1-1--1--5-5-5-5-3-3-----|