A Mexican friend just forwarded me a link about the visa question. So that problem is solved. see the link here:
http://portal.sre.gob.mx/was_eng/index.php?option=displaypage&Itemid=55&op=page&SubMenu=
http://portal.sre.gob.mx/was_eng/index.php?option=displaypage&Itemid=55&op=page&SubMenu=