If you are looking for sources to help you finance your education, the following sites may be helpful. You might also want to contact colleges or universities directly and ask them about the opportunities and support they provide for international students.
International Education Financial Aid: http://www.iefa.org/
International Scholarships: www.InternationalScholarships.com
Hispanic College Fund: www.hispanicfund.org
CHCI - Developing the next generation of Latino Leaders: http://www.chci.org/
The Gates Millennium Scholars: www.gmsp.org