This is the way i play it, and the last tab has issues, so.
Drop B Tuning is used on nearly all the blackening. C Standard with the low string a 
step down.
This is the full 9 min album version. Not the single Version
-------------------------------------------------------------------------------
			     Halo - Machine Head
-------------------------------------------------------------------------------

Tabbed By : Hammerzeit
e-mail: chrissalix@googlemail.com

Tuning: Drop B
Intro Riff (x16)
E |------------------------------------------|
B |--4---------------------------------------|
F#|------------------------------------------|
B |----2-2-3-2-3-0-2-0-2-2-3-3-2-2-----------|

Silence while Guitar does its whammy bar dive

All of This (x2)

After The Dive(x3)
E |------------------------------------------|
B |--4---------------------------------------|
F#|------------------------------------------|
B |----2-2-3-2-3-0-2-0-2-2-3-3-2-2-----------|
Then
Last of measure (x1)
E |-----------------------------------------------|
B |--4--------------------------------------------|
F#|-----------------------------------------------|
B |----2-2-3-2-3-0-2-8p7-0-7h8-0-8h10-------------|

Then After all of the above twice

"This is a call to arms"
E |-(X1)-----------------------(X2)---------------------------------------|
B |--------------------------------4--------------------------------------|
F#|-----------------------------------------------------------------------|
B |-2----12/--1111111111111111--------2-2-3-2-3-0-2-0-2-2-3-3-2-2-2-------|


E |-(X1)-----------------------------(x2)--------------------------------|
B |--------------------------------------4-------------------------------|
F#|----------------------------------------------------------------------|
B |-1----12/--3333333333333333--------------2-2-3-2-3-0-2-0-2-2-3-3-2-2--|

With this, You play the bit with x1 above it once followed by the main riff twice.

Then Pre Chorus
E |--------------------------------------------------------|
B |--------------------------------------------------------|
F#|-0000000000000000--222222222222-------------------------|
B |---------------------------------0~---------------------|

Chorus (all x2)
E |-------------------------------------------------------|
B |-------------------------------------------------------|
F#|--77777777777777-9-10---------------------------7-9-10-|
B |----------------------9-9-9-9-9-9-9-9-9-9-9-9-9--------|

E |---------------------------------------------------------------------|
B |---------------------------------------------------5-5-5-5-----------|
F#|--0000000000000-7-9-10---------------------5-5-5-5-------------------|
B |-----------------------9-9-9-9-10-10-10-10---------------------------|

Post chorus Played under Harmonic
E |--------------------------------------------|
B |-------5/-----------------------------------|
F#|--------------------------------------------|
B |--------------------------------------------|

Main Riff Again (x1)

E |------------------------------------------|
B |--4---------------------------------------|
F#|------------------------------------------|
B |----2-2-3-2-3-0-2-0-2-2-3-3-2-2-----------|

E |-----------------------------------------------|
B |--4--------------------------------------------|
F#|-----------------------------------------------|
B |----2-2-3-2-3-0-2-8p7-0-7h8-0-8h10-------------|

Verse Again
"This is a right to life...."
E |-(X1)-----------------------(X2)---------------------------------------|
B |--------------------------------4--------------------------------------|
F#|-----------------------------------------------------------------------|
B |-2----12/--1111111111111111--------2-2-3-2-3-0-2-0-2-2-3-3-2-2-2-------|


E |-(X1)-----------------------------(x2)--------------------------------|
B |--------------------------------------4-------------------------------|
F#|----------------------------------------------------------------------|
B |-1----12/--3333333333333333--------------2-2-3-2-3-0-2-0-2-2-3-3-2-2--|

second Pre Chorus
E |------------------------------------------------------|
B |------------------------------------------------------|
F#|--0000000000000000--2222222222222222222222222222------|
B |--------------------------------------------------0~--|

Chorus (all x2)
E |-------------------------------------------------------|
B |-------------------------------------------------------|
F#|--77777777777777-9-10---------------------------7-9-10-|
B |----------------------9-9-9-9-9-9-9-9-9-9-9-9-9--------|

E |-------------------------------------------------------------|
B |---------------------------------------------------5-5-5-5---|
F#|--0000000000000-7-9-10---------------------5-5-5-5-----------|
B |-----------------------9-9-9-9-10-10-10-10-------------------|

Main Riff After Chorus (x12)
E |------------------------------------------|
B |--4---------------------------------------|
F#|------------------------------------------|
B |----2-2-3-2-3-0-2-0-2-2-3-3-2-2-----------|

Bridge A (x4)
E |------------------------------|
B |------------------------------|
F#|------------------------------|
B |--222222222-------------------|
 Listen to the song for the pace of that, its fast.

Then The Riffery begins
Riff A (x4)
E |------------------------------------------|
B |------------------------------------------|
F#|----------------5h7-5h7-------------------|
B |--2233555-2-3-3---------------------------|

Bridge B (x4)
E |------------------------------------------|
B |------------------------------------------|
F#|------------------------------------------|
B |--222222222/8\2---------------------------|

Riff B x 8
E |----------------------|
B |----------------------|
F#|-------------3h5-3h5--|
B |-0-1-1/3-010----------|

Short Break For Start of Demmels solo

Then Riff C/ Solo Backing A (x2)
E |----------------------------------------------------|
B |----------------------------------------------------|
F#|------------------3h5 3h5-----------------3h5-3h5---|
B |--0-3-6---0-3-0-------------0-3-6---0-3-0-----------|

E |------------------------------|
B |------------------------------|
F#|---------8-7---------7-5-8-7--|
B |---5~---------10-7------------|

Solo Backing B (x4) (twin solo starts after 2nd measure)
E |------------------------------------------|
B |------------------------------------------|
F#|------------------------------------------|
B |--22222222-44444444-55555555-7777-9-7-5---|

Then End of duel backing
E |------------------------------------------|
B |------------------------------------------|
F#|------------------------------------------|
B |-99999997-99999997-99999997-99999997------|

End Solo
E |------------------------------------------|
B |------------------------------------------|
F#|--7------3------0------2/-----------------|
B |------------------------------------------|

Silence while guitars play intro riff once
Second time
E |-----------------------------|
B |----------10---------7-------|
F#|---7-------------------------|
B |-----------------------------|

Silence for 16 bars "i won't pray for you" etc.

Then Heavy comes back in
(x1)
E |--------------|
B |--------------|
F#|------3--0--2-|
B |--2-----------|

E |------------------------|
B |---------------------5--|
F#|------3--0--2--3p0-5----|
B |--2---------------------|

Then x2
E |------------------------------------|
B |-------------------------------5----|
F#|---------3-3-33--0-0-00--2-3-5------|
B |-2-2-22-----------------------------|

Then modified chorus

E |-------------------------------------------------------------------|
B |----------------------9999999999999999-----------------------------|
F#|--77777777777777-9-10------------------79-10-00000000000000000-----|
B |-------------------------------------------------------------------|

Straight into

After The Dive(x3)
E |------------------------------------------|
B |--4---------------------------------------|
F#|------------------------------------------|
B |----2-2-3-2-3-0-2-0-2-2-3-3-2-2-----------|

Then

Last of measure (x1)
E |-----------------------------|
B |--4--------------------------|
F#|-----------------------------|
B |----2-2-3-2-3-0-2--023-023---|

Intro Riff (x4)
E |------------------------------------------|
B |--4---------------------------------------|
F#|------------------------------------------|
B |----2-2-3-2-3-0-2-0-2-2-3-3-2-2-----------|

Pause
E |------------|
B |------------|
F#|------------|
B |--2/14\2----|

Then

Intro Riff (x4)
E |------------------------------------------|
B |--4---------------------------------------|
F#|------------------------------------------|
B |----2-2-3-2-3-0-2-0-2-2-3-3-2-2-----------|

End on
E |---------------|
B |---------------|
F#|---------------|
B |--22222222-2---|

| /  slide up
| \  slide down
| h  hammer-on
| p  pull-off
| ~  Let Ring
===============================================================================

Enjoy, its fun to play along to.