first riff (a)
C#|-------------------------------------------------------|
G#|-------------------------------------------------------|
E |-------------------------------------------------------|
B |-------------------------------------------5-----------|
F#|-7-5-5-5-5--7-7-7-10-10---7-7-7-5-5--7-7-7-3-5---------|
C#|-5-5-5-3-3--5-5-5-8--8----5-5-5-3-3--5-5-5---3---------| x3
first riff (b)
C#|-------------------------------------------------------|
G#|-------------------------------------------------------|
E |-------------------------------------------------------|
B |-------------------------------------------7-5---------|
F#|-7-5-5-5-5--7-7-7-10-10---7-7-7-5-5--7-7-7-5-3-5-------|
C#|-5-5-5-3-3--5-5-5-8--8----5-5-5-3-3--5-5-5-----3-\\----| x1
After that 3 powerchords and the two slides, they goes to the second riff
second riff
C#|---------------------------------------------------------------------------|
G#|---------------------------------------------------------------------------|
E |---------------------------------------------------------------------------|
B |---------------------------------------------------------------------------|
F#|-------5-3-----------------5p3p0-----------5-3---------------5p3p0---------|
C#|-4-3-3-----3-5-5-5-4-4-3-3-------3-0-4-3-3-----5-5-5-4-4-3-3-------3-3-----| x1
third riff
C#|----------------------------|
G#|----------------------------|
E |----------------------------|
B |----------------------------|
F#|-7-7-7-6-5-4-3-5-3----------|
C#|-5-5-5-4-3-2-1-----3--------| x2
    . . . . . . .
fourth riff
C#|----------------------------|
G#|----------------------------|
E |----------------------------|
B |----------------------------|
F#|-----3--------5-3-----------|
C#|-3-5--5-3-2p0-----3---------| x4
Jimmy doesn't really do the pull-off at least in the recording, 
but in some live version i think he does it.
fifth riff
C#|----------------------------|
G#|----------------------------|
E |----------------------------|
B |-----5-5-7-5-------8--------|
F#|-5-5-3-3-5-3-5-7-7-6--------|
C#|-3-3---------3-5-5----------| x1
After this section with this five riff, 
they repeat over and over, sometimes slowing it down a bit, 
or going a little bit faster, the first riff (a).

************************************
| p   Pull-off
| \   Slide down
| .   Palm mute
************************************