This is the address for the school in Guadalajara. The address I posted before was in Texas and is only for letters and flat mailers. Packages can be sent to the school here:
Circunvalacion Sur 62
Las Fuentes Zapopan
Guadalajara, Jalisco Mexico 45070
I don't know anything about sending packages yet. But as soon as I hear how it works I will update. I've heard mixed opinions about the reliability of receiving mail in Mexico.
(If you forget to write down this address of the last one, you can always check the archive of previous posts for it)