wait until guitar starts:

I suggest drop D-tuning, if you want power chords on the heavy part.

e 
b 
g  7 9 7 9 9 11  12  11
d 0 0 
a     0 0 7 7  10  10
D

then after a while it changes:

e
b
g  7 9 7676bend 764/6 9 11  12  11
d 0 0
a              0     7 7  10  10
D

now for the *higher* solo:

e
b
g          18 19          19
d 16 14 16       19 21 12
a 
D

heavy part:

e
b 
g 
d 12 11x about 7 11x 2 11x 5
a 12           7     2     5
D 12           7     2     5

or if you want, do standard tuning with these chords at the heavy part:

D A Em G

Thats about it. Any questions, pm me at the forums.