The transcript posted by robbreid was also published by the UNIVERSAL newspaper today (I have a copy in Spanish).
According to the newspaper this transcript was the result of the report made by the National Transportation Safety Board (NTSB).
The translation made by Google is not bad (I am surprised).
Reading it in Spanish is more dramatic, though.
The dialoge in the cockpit makes clear reference of the turbulence left by the Mexicana 767:
Pilot: Wow! the turbulence of that
(Translated by Google in robbreid note as "Oral turbulence of the latter")...huh?
Today´s evidence gives more support to the wake turbulence theory