Ok ive got the parts up to the mariachi part. its 90 % right so here it goes.......    
tuning ( CGCFAD )

---x-----x-x-x-x------x-----x-x-x-x------x-----x-x-x-x---------x-----x-------|
---3-----3-3-3-3------x-----x-x-x-x------x-----x-x-x-x---------x-----x-------|
---2-----2-2-2-2------x-----x-x-x-x-----10----10-10-10-10------9-----9-9-9-9-|
---0-----0-0-0-0------7-----7-7-7-7------8-----8-8-8-8---------7-----7-7-7-7-|
---0-----0-0-0-0------4-----4-4-4-4------8-----8-8-8-8---------7-----7-7-7-7-|
---0-----0-0-0-0------x-----x-x-x-x------8-----8-8-8-8---------7-----7-7-7-7-|
(You do this twice, then you do this twice again but the ryhtem is alittle different but
its not hard to figure out)(this is brents part, J.B's im not sure on for the intro)

(this is the ending before the part below)
--x-x-x-x-----x-x-x-x----x-x-|
--x-x-x-x-----x-x-x-x----x-x-|
--9-9-9-9-----9-9-9-9----9-9-|
--7-7-7-7-----7-7-7-7----7-7-|
--7-7-7-7-----7-7-7-7----7-7-|
--7-7-7-7-----7-7-7-7----7-7-|




------------------------------------------------|  (Lead guitar)
--10--------------------------------------------|
--------10-----9h10----10----9h10-----10------9-|
------------------------------------------------|
------------------------------------------------|
-----0------0-------0------0--------0-----0-----|

(rythm)
------------------------------------------------------------------------------------|
------------------------------------------------------------------------------------|
------------------------------------------------------------------------------------|
------------------------------------------------------------------------------------|
------------------------------------------------------------------------------------|
0-0-0-0-0-0-0-0-0-0-0-0-0-0-0-0-11-11-11-11-11-11-11-11-11-11-11-11-11-11-11-11-8-8-|

-------------------------------------------------------------|
-------------------------------------------------------------|
-------------------------------------------------------------|
-------------------------------------------------------------|
-------------------------------------------------------------|
8-8-8-8-8-8-8-8-8-8-8-8-8-8-7-7-7-7-7-7-7-7-7-7-7-7-7-7-7-7--|


(This part you can either do one of two things, play the two guitars separate, or play 
them together) ( this part is them together)
----------------------------------------------------------------------------|
----------------------------------------------------------------------------|
--7-7-9-7---7-7-7---7-7-9-7---7-7-7----10-10-12-10---10-10-10---10-10-12-10-|
--0-0-0-0---0-0-0---0-0-0-0---0-0-0----8--8--8--8----8--8--8----8--8--8--8--|
--0-0-0-0---0-0-0---0-0-0-0---0-0-0----8--8--8--8----8--8--8----8--8--8--8--|
--0-0-0-0---0-0-0---0-0-0-0---0-0-0----8--8--8--8----8--8--8----8--8--8--8--|

---------------------------------------------------------------------------|
---------------------------------------------------------------------------|
--14-14-15-14---14-14-14---14-14-15-14---14-14-14--------------------------|
--12-12-12-12---12-12-12---12-12-12-12---12-12-12---14-14-15-14---14-14-14-|
--12-12-12-12---12-12-12---12-12-12-12---12-12-12---10-10-10-10---10-10-10-|
--12-12-12-12---12-12-12---12-12-12-12---12-12-12---10-10-10-10---10-10-10-|

(after that there is a little scale thing and then it repeats itsself one more time.
now if you want to do that part in two pts. just have the high notes for one guitar and
use the bass notes as another. i hopes this helps, i love the acoustic version.  i tried 
my best enjoy)