I got tired of seeing inexperienced people post very inaccurate tabs, so I made my own.

Tabbed By: Myrfnatr
Tuning: Drop C (CGCFAD)

Key
***
... -palm mute
h   -hammer on
p   -pulloff
  -pinch harmonic and vibrato
/   -slide down
\   -slide up
*   -natural harmonic
~   -ring out

Both Guitars
|------------------------------------------------------|
|------------------------------------------------------|
|------------------------------------------------------|
|----7------7-----7-----7-----7-----7-----7-----7--0~--|
|----5*-----5*----5*----5*----5*----5*----5*----5*-0~--|
|-000---000----000---000---000---000---000---000---0~--|
  ...   ...    ...   ...   ...   ...   ...   ...

Guitar 1
Riff A
x3
|----------------------------------------------|
|----------------------------------------------|
|----------------------------------------------|
|-7\-0---1p0-----1p0-----1p0-0h1h3-0-----------|
|-7\-0---1p0--5*-1p0--5*-1p0-0h1h3-0-----------|
|-7\-0-0-1p0-----1p0-----1p0-0h1h3-0-----------|
       .
on the 4th time play this
|-----------------------------------------|
|-----------------------------------------|
|-----------------------------------------|
|-0---1p0-------000-1p0-------------------|
|-0---1p0-4-4-4-000-1p0-4-4-4-------------|
|-0-0-1p0-------000-1p0-------------------|
    .           ...

Guitar 2
right after guitar 1 slides up from the 7
|-----------------------------------------------|
|-----------------------------------------------|
|-----------------------------------------------|
|-0--------0~-1-0~-1-0-00000000000--------------|
|-0--pause-0~-1-0~-1-0-00000000000--------------|
|-0--------0~-1-0~-1-0-00000000000-11\----------|
  .                    ...........

Then both guitars play Riff A once then go into this
Both Guitars
Riff B
|----------------------------------------| x3
|----------------------------------------|
|----------------------------------------|
|-0-0-1-0-4-0-1-0-4-0-1-0-0-1-4----------|
|-0-0-1-0-4-0-1-0-4-0-1-0-0-1-4----------|
|-0-0-1-0-4-0-1-0-4-0-1-0-0-1-4----------|
    . . . . . . . . . . . . . .
Both guitars on the 4th time play this
|-----------------------------------------|
|-----------------------------------------|
|-----------------------------------------|
|-0---1p0-------000-1p0-------------------|
|-0---1p0-4-4-4-000-1p0-4-4-4-------------|
|-0-0-1p0-------000-1p0-------------------|
    .           ...

Guitar 1 and 2
Riff C
|---------------------------------------------|---
|---------------------------------------------|   \
|---------------------------------------------|    |
|---------------------------------------------|    |
|---5-7-7h8--5-7-7h10-10-8-7-8-10-8-7-8-7p0---|    |
|-00-0-0---00-0-0-------8-8-8-8--8-8----------|    |
  .. . .   .. . .       . . . .  . .                \
                                                    / x2
|---------------------------------------------|    |
|---------------------------------------------|    |
|---------------------------------------------|    |
|---------------------------------------------|    |
|---5-7-7h8--5-7-7h8h10-8-7-8-10-8-7-8-7p0----|    /
|-00-0-0---00-0-0------8-8-8-8--8-8-----------|---
  .. . .   .. . .      . . . .  . .


ring out these chords with second half of above
|--------------------| x2
|--------------------|
|----7~--------------|
|-0~-7~-8~-10~8------|
|-0~-5~-8~-8~-8------|
|-0~----8~-8~-8------|

Guitar 1
Riff D
|---------------------|
|---------------------|
|---------------------|
|-0~-11~-2~-0~-0------|
|-0~-11~-2~-0~-0------|
|-0~-11~-2~-0~-0------|
               .

Guitar 2
|----------------------|
|----------------------|
|----------------------|
|-0~-0~-0~-0~-0--------|
|-0~-0~-0~-0~-0--------|
|-0~-0~-0~-0~-0--------|
              .
Guitar 1
Riff E
I'm not gonna put in how many times to hammer on for each set of notes..it's 
pretty easy
just make out how long he's doing it for but use these in this order. For 
the third time through this, palm mute the 0's.
|-----------------------------| x3
|-----------------------------|
|-----------------------------|
|-----------------------------|
|-5h8p0-4h7p0-7h10p0-5h8p0----|
|-----------------------------|

Guitar 2 palm mutes these over and over you can figure out
how long to play each one
|----------------|
|----------------|
|----------------|
|-0-11-2-0-------|
|-0-11-2-0-------|
|-0-11-2-0-------|
  . .  . .
|-----------------------------------------|
|-----------------------------------------|
|-----------------------------------------|
|-000-------000-------000-------000-------|
|-000-------000-------000-------000-------|
|-000-3h6p0-000-3h6p0-000-3h6p0-000-3h6p0-|
  ...       ...       ...       ...

Then guitar 1 keeps playing the hammer on riff and
guitar rings out these single palm mutes
|----------------------------------------|
|----------------------------------------|
|----------------------------------------|
|-0~-0~-6~-6~-2~-2~-0~-------------------|
|-0~-0~-4~-4~-2~-2~-0~--xxpick slidexx---|
|-0~-0~-------2~-2~-0~--xx----------xx---|
  .  .
At the end of guitar 2's pick slide, guitar 1 does a pinch harmonic
|--------|
|--------|
|--------|
|--------|
|-----|
|--------|

Riff F
Both Guitars
|-----------------------------|
|-----------------------------|
|-----------------------------|
|-0-00000-00000-00000-00000---|
|-0-00000-00000-00000-00000---|
|-0-00000-00000-00000-00000---|
  . ..... ..... ..... .....

(these are 11's, by the way)
|-----------------------------------------------------------|
|-----------------------------------------------------------|
|-----------------------------------------------------------|
|-11-1111111111-11-1111111111-11-1111111111-11-1111111111---|
|-11-1111111111-11-1111111111-11-1111111111-11-1111111111---|
|-11-1111111111-11-1111111111-11-1111111111-11-1111111111---|
     . . . . .     . . . . .     . . . . .     . . . . .

|--------------------------------------|
|--------------------------------------|
|--------------------------------------|
|-2-22222-2-22222-2-22222-2-22222------|
|-2-22222-2-22222-2-22222-2-22222------|
|-2-22222-2-22222-2-22222-2-22222------|
    .....   .....   .....   .....

|-----------------------------------------|
|-----------------------------------------|
|-----------------------------------------|
|-00-------00-------00--------------------|
|-00-------00-------00--------------------|
|-00-3h6p0-00-3h6p0-00-3h6p0-3h6p0-0h2h3--|
  ..       ..       ..
Riff G
Both Guitars
|-----------------------|
|-----------------------|
|-0~-0-1~-0-1-3-0~-0-1~-|
|-0~-0-1~-0-1-3-0~-0-1~-|
|-0~-0-1~-0-1-3-0~-0-1~-|
     .    . . .    .
Then guitar 1 pick slides and they go back into
Riff C
Guitar 1
|---------------------------------------------|---
|---------------------------------------------|   \
|---------------------------------------------|    |
|---------------------------------------------|    |
|---5-7-7h8--5-7-7h10-10-8-7-8-10-8-7-8-7p0---|    |
|-00-0-0---00-0-0-------8-8-8-8--8-8----------|    |
  .. . .   .. . .       . . . .  . .                \
                                                    / x2
|---------------------------------------------|    |
|---------------------------------------------|    |
|---------------------------------------------|    |
|---------------------------------------------|    |
|---5-7-7h8--5-7-7h8h10-8-7-8-10-8-7-8-7p0----|    /
|-00-0-0---00-0-0------8-8-8-8--8-8-----------|---
  .. . .   .. . .      . . . .  . .

Then guitar 1 keeps playing the same riff
and guitar 2 harmonizes using this:
|---------------------------------------------------| x2
|---------------------------------------------------|
|---------------------------------------------------|
|---3-5-5h7-3-5-5h7/10-8-7-8-10-8-7-8-7p0-----------|
|---------------------------------------------------|
|-00-0-0--00-0-0------0-0-0-0--0-0------------------|
  .. . .  .. . .      . . . .  . .

Both Guitars end on
|--------|
|--------|
|--------|
|013-0~--|
|013-0~--|
|013-0~--|
...

Special thanks goes to Eric C., who made the "frame" for this.