Dropped D tuning. 
The main riff is as follows (in 6/4 time): 

G||--------------------------------||
D||o--0--3--0--10-10-10--0-0-0-0--o||
A||o--0--3--0--8--8--8---0-0-0-0--o||
D||---0--3--0--8--8--8---0-0-0-0---||
A second guitar plays along with this riff: 
G||---------12-12-12-12-------------||
D||o--0--3--12-12-12-12---0-0-0-0--o||
A||o--0--3----------------0-0-0-0--o||
D||---0--3----------------0-0-0-0---||
For the verse just play the same riff muted and the second guitar plays at the 8th fret G string
 as fast as posible while bending and unbending. 
For the "tomorrow begat tomorrow" part play: 

G||--3--3--3-3-3--4--4--||--3--3--3-3-3--6--6--||
D||--3--3--3-3-3--5--5--||--3--3--3-3-3--7--7--||
A||--1--1--1-1-1--3--3--||--1--1--1-1-1--5--5--||
D||---------------------||---------------------||

G||--3--3--3-3-3--4--4--||
D||--3--3--3-3-3--5--5--||
A||--1--1--1-1-1--3--3--||
D||---------------------||