I have already been to this site and I cannot find an answer to this question.
Here's your question and my response.
What was the United State's roll in the Mexican Independence?
History - Ms. Sue, Sunday, September 13, 2009 at 2:21pm
http://www.mexonline.com/mexican-independence.htm
I didn't see anything about U.S. being involved in Mexican independence either.
You may want to check some of these other sites.
http://www.google.com/search?source=ig&hl=en&rlz=1G1GGLQ_ENUS342&q=Mexico+independence&aq=f&oq=&aqi=