This is linkin parks best instrumentle song I ever heard in my opinion. 
Tuning: L C#,G#,C#,F#,A#,D# H

Riff A (arr. for gtr)

harm.........................
D#---------|---------|----12---|
A#----7----|---------|---------|
F#---------|----5----|---------|
C#---------|---------|---------|
G#---------|---------|---------|
C#---------|---------|---------|

These are the chords that they play after the harmonics
     F#         Em       F#
D#---------|---------|--------|
A#---2-----|---------|----2---|
F#---3-----|----0----|----3---|
C#---4-----|----2----|----4---|Repeat as many times as it does in the song
G#---------|---------|--------|
C#---------|---------|--------|

Riff B These are the chords Played during Riff B2

     F#         F#       Em
D#---------|---------|--------|
A#---2-----|---------|--------|
F#---3-----|----2----|----0---|
C#---4-----|----3----|----2---|Repeat as many times as it does in the song
G#---------|----4----|--------|
C#---------|---------|--------|

Riff B2 (arr. for gtr)

D#---6--6--6--7---|---9--9--6--6---|---7--7--7--9---|--10-10-7-7-|
A#----------------|----------------|----------------|------------|
F#----------------|----------------|----------------|------------|Repeat
C#----------------|----------------|----------------|------------|
G#----------------|----------------|----------------|------------|
C#----------------|----------------|----------------|------------|

Riff C
             harm            harm..................
D#------------12-|---------------|             |-------12--|-----|
A#---14-14-14----|---14-14-14-7--|             |---7-------|--7--|
F#---------------|---------------|             |-----------|-----|
C#---------------|---------------|repeat 3x    |-----------|-----|
G#---------------|---------------|then do this |-----------|-----|
C#---------------|---------------|             |-----------|-----|

Then End with the chords that I've already tabbed. there you go. A masterpiece.
Enjoy. I don't think I need comments or e-mails cause I Know this is 100% right. see ya