to the teeth

g---------------------------------------------
d-------------------------------------------
a----------------------8--10---------------
e---5h6----6h10--------------------------

the "weary as water" part goes like this:

g----------------------------------------------------
d----------------------------------------------------
a---------------------------5h8--------------------
e---------10-/-1-\-6---------------6---------------

when you return to the main riff, start alternating that with this:

g---------------------------------------------
d--------------------------------------------
a----------------------8----------------------
e---5h6----6h10--------------3------------

or this:

g-----------------------------------------------
d-----------------------------------------------
a----------------------------------------------
e---5h6----6h10--------1---3---------------

lead into the next part (the "diggin' on the sound" part) with this:

g---------------------------------------------
d-------------------------------------------
a--------------------------------------------------8-------10
e---6--------6--10-------10--6------10--------------------

for the first part of the rap, play g's (fifth fret on the d string) on the upbeat.  When he says: "Jam", you switch to this riff:

g-------------------------------------------------
d--5-------------------------5-------------------
a-------5-h-8--------------------5-h-8-----
e-----------------6---------------------------------6-6-6-6--

and end the song that way. 

h=hammer-on

/=slide

Nathan