Slipknot - Scissors Tabs

Tune down 1 ½ steps then drop “B”

I can’t tell what they are playing in the beginning, but I think they might be using a bass wah.
So here’s what I know.
You need to take some sort of Whammy pedal(I have a DODGS30,but you can use a Digitech) and set the pitch for one octave down. Then, you depress the pedal halfway, I think the pitch is F#, but not sure. The best idea for it is to get your detuned open B to sound like your 4 while not detuned.  This works on my GS30, but I don’t know how it will sound on a Digitech.

Here is the first distinct guitar sound.Its at about 2:05,remember to set the pitch.
C#:--------------------------------
G#:--------------------------------
E:--------------9999999---------
B:----------------------------------
F#:---------------------------------
B:----------------------------------
Crescendo that, or for you who don’t know music terms, gradually get louder.
Then, this(keep that pedal where it is)
C#:-------------------------------------------------------
G#:-------------------------------------------------------
E:---------------------------------------------------------
B:---1111—0-------------------------------------------
F#:--1111—0let ring----------------------------------
B:---1111—0-------------------------------------------

Then(still detuned pitch):
Note:Timing for this part isn’t that accurate.
Also, feel free to put this on the bottom 3 strings and not just the bottom.
C#:--------------------------------------------------------
G#:--------------------------------------------------------
E:----------------------------------------------------------
B:----------------------------------------------------------
F#---------------------------------------------------------
B:--1h2-1h2-1h2-x4~x4~x0---------------------------
   p.m.........
I've also found this works:
Note:Fully depress 1 octave down pedal.

C#-----------------------------------------
G#-----------------------------------------
E------------------------------------------
B-------------------------------------------
F#-1h2-1h2-1h2-x4~x4~x4~x0--------------
B------------------------------------------
  p.m.........]
That’s pretty much all that’s there. The other little parts I think you people 
can figure out, they aren’t that difficult. Just some 0’s and 1’s. 
Then for the end,just mess around with a flanger.
Thanks