The lead part is as follows:repeat six times then do:                vib.
---------------------   --------------------8-------
------8-----8h9p8----   ------8-------8h9------8----
--8-8---8-8-------8--   --8-8---8-8-8------------8--
---------------------   ----------------------------
---------------------   ----------------------------
---------------------   ----------------------------Eb5  Bb          Ab
  Today is the greatest day I've ever knownEb5     Bb         Ab
  Can't live for tomorrow, tomorrow's much too longEb5    Bb      Ab
  I'll burn my eyes outEb5  Bb     C  Before I get out
F   Ab     C    F      Ab         C
  I wanted more   than life could ever grant me
F       Ab     C     F    Ab     G   D5/A  Bored by the chore   of saving face
The lead part over the above chords is really simple, play it on
the first and third times, over the C (8th fret) chord: slow bend w/vib
----------------------5b7-------------------------------------------------------
----------------Eb5  Bb         Ab   Today is the greatest day I've ever known
Eb5     Bb         Ab  Can't wait for tomorrow, I might not have that long
Eb5    Bb      Ab        Eb5   Bb    C
  I'll tear my heart out    before I get out
Play this lead part above the second verse (clean guitar):
-----------------------------------------|--------------------
-----------------------------------------|--------------------
---------------------12-13---12h13p12----|--------------------
---13----15----13---------------------13-|-13----15----13-----
------13----13----13---------------------|----13----13----13--
-----------------------------------------|--------------------
------------------------------------------|--------------------
---------------------11-------------------|--------------------
---12-13-------------------12h13p12-------|--------------------
---------13-------------13----------13p12-|-13----15----13-----
------------13----13----------------------|----13----13----13--
---------------11-------------------------|--------------------
----------------------------------|-----------------------------
--------------------11------------|-----------------------------
--12-13-------12---------13p12----|-----------------------------
--------13------------------------|-13----15----13----17p13-----
-----------13----13------------13-|----13----13----13-------13--
----------------------------------|-----------------------------
                   dist.  vib--------------------------------
-----------------------13--------------------------/12----12---
-----------------------------------13/15-15-15-15---------------
--------------------------------