Not sure about the verse, but it sounds right.
Too bad I cant play it with horns in the background:(

Intro (x2):
E|-----5---------6----------5-------------|
B|----6-6-------6-6--------5-5------------|
G|---7---7-----7---7------6---6-----------|
D|--7-----7---8-----8----7-----7----------|
A|-5---------8----------7-----------------|
E|-----------------------slowly-----------|

Intro 2 (x2) - same as chorus (without the lyrics:)

Verse (x2):
 (Yo soy un vato espan-toso)
E|-----------------------------------------|
B|-----------------------------------------|
G|---------------------7~------------------|
D|---------------------7~---8-7------------|
A|---------------------5~---8-7------------|
E|-4h5p4h5p4h5p4h5p4h5------6-5------------| 
(play powerchords or just one string)


End Verse:
E|-----------------------|
B|-----------------------|
G|-------7---------------|
D|-8-7-8-7---8---7~------|
A|-8-7-8-5---8---7~------|
E|-6-5-6-----6---5~------|

Chorus (x4):
E|------------------------------|
B|------------------------------|
G|-7------------7-------------|
D|-7- x7--5-----7- x7-8-8-7----|
A|-5-/----5- x5--5-/---8-8-7----|
E|--------3-/----------6-6-5----|
 PM.........................

Pre-solo(x2):
E|-------------------------------------|
B|-------------------------------------|
G|-------------------------------------|
D|-----------------7p6h7p6-6p5h6p5-----|
A|-5p4h5p4-8p7h8p7---------------------|
E|-------------------------------------|

Solo:
E|-3---6---3---6---------------------------|
B|--3---6---3---6-8-- figure out the rest -|
G|------------------- on your own. It'll  -|
D|------------------- take some time...   -|
A|-----------------------------------------|
E|-----------------------------------------|

Chorus (x4)
Verse (x2)

End Verse 3rd time:
E|--------------------|
B|--------------------|
G|--------------------|
D|-8-7-8-7-8-7-8-7----|
A|-8-7-8-7-8-7-8-7----|
E|-6-5-6-5-6-5-6-5----|


Final Verse(x3):
(Mi ferocidad se siente asta Mexico)
E|-------------------------|
B|-------------------------|
G|-------------------------|
D|-8-----7---------------|
A|-8- x8--7- x8------------|
E|-6-/----5-/--------------|

End Final Verse:
(Del bosque el mas chingon)
E|--------------------|
B|--------------------|
G|--------------------|
D|-8----8-7-8-7------|
A|-8- x8-8-7-8-7------|
E|-6-/---6-5-6-5------|

Final Chorus (x6):
E|----------------  ----Don't play last time  --|
B|----------------  ------------------------  --|
G|-7-x-------------7-x------------------------|
D|-7-x- x4-8-x-----7-x- x4--3-x-3-x-7-x-7-x----|
A|-5-x-/---8-x- x4--5-x-/----3-x-3-x-7-x-7-x----|
E|---------6-x-/-------------1-x-1-x-5-x-5-x----|
Just mute, don't pick the muted 
string like you do in ska

End on:
(El mas chingon)
E|-------------------------|
B|-------------------------|
G|-----------7~------------|
D|-7~--------7~------------|
A|-7~--------5~------------|
E|-5~----------------------|


Lyrics:

El Mas Chingon

Yo soy un vato espantoso
Los otros se ponen muy nerviosos

chorus:
YO SOY EL MAS CHINGON!!
YO SOY EL MAS CHINGON!!
CHINGON
CHINGON
YO SOY EL MAS CHINGON!!
YO SOY EL MAS CHINGON!!

Que chido son las noches de tequila
Borracho y cantando la misma cancion

(Guitar Solo)

(chorus)

Solo mis amigos me pueden aquietar
Porque yo soy el mas chingon

Mi ferocidad se siente asta Mexico
Es donde mi arbol retono
Soy una rama con espinas
Del bosque el mas chingon

(chorus)