This is how I play it, and how Matt Belemamy usually does live.
NOTE: when the nuber has a # next to it, that means it is a harmonic, i.e.: rest your fretting finger lightly on the indicated fret. 
THIS IS IN DROP-D tuning.

1-----------------------------------------------------------------------------------
2-----------------------------------------------------------------------------------
3-----------------------------------------------------------------------------------
4--12-0-0-12-0-0-12-0-0--#3-#3-#3--12-0-0-12-0-0-12-0-0---------12-0-0-12-0-0-12-0-0
5---------------------------------#12---0--------------#3-#3-#3---------------------
6---------------------------------#12-----------------------------------------------

1---------------------------------------------------------------------------------
2---------------------------------------------------------------------------------
3---------------------------------------------------------------------------------
4-----------#3/(12)------------------------------------------0-12-0-0-12-0-0-12-0-
5--------#3-#3/(12)----------------------------------------0-0-12-0-0-12-0-0-12-0-
6--#3-#3-#3-#3/(12)-12-0-0-12-0-0-12-0-0-0-3-4-5-7/(10)/12-0-0-12-0-0-12-0-0-12-0-

1-----------------------------------------------------------------
2-----------------------------------------------------------------
3-----------------------------------------------------------------
4-0-0-0-3-4-5-7/(10)/12-0-0-12-0-0-12-0-0-12-0-0-0-3-4-5-7/(10)/12
5-0-0-0-3-4-5-7/(10)/12-0-0-12-0-0-12-0-0-12-0-0-0-3-4-5-7/(10)/12
6-0-0-0-3-4-5-7/(10)/12-0-0-12-0-0-12-0-0-12-0-0-0-3-4-5-7/(10)/12
                     [?????????????????????????????????????????????]
Then, repeat the indicated bit above as many times as desired before the verse. Which
I still have to work out, as it is a very complicated piece of lightning fast hammer ons...

Check back soon for the verse and pre-chorus.