this is how i play the mexican hat dance, i dont know if its completely right but its 
to play.

G --0-5-0-5-0-5-0-5-7-5-4-4-5-7------------|
D -----------------------------------------|
A -----------------------------------------|
E -----------------------------------------|

G -0-4-0-4-0-4-0-4-5-4-2-2-4-5-------------|
D -----------------------------------------|
A -----------------------------------------|
E -----------------------------------------|

G -4-3-4-1-0-1---------------------------------|
D -------------2-1-2-----------------4-6-7-4---|
A -------------------2---------4-6-7-----------|
E -----------------------4-5-7-----------------|

G ---------------------4-4-4-6-4------------|
D -7-6-7-4-3-4-1-0-1-------------7-6-4------|
A -------------------2-----------------7----|
E ------------------------------------------|