From what I know it's virtually impossible for non-US citizens/residents to gain admission into a US medical school. For those few that do consider international applicants, most require them to have completed at least 1 undergrad year at a US/Canadian uni. I found some websites that sum it up better than I ever could; sorry in advance for the long post =):
From the Uni.of Georgia,
http://premed.uga.edu/guide/four.htm#international
"International students in the USA... often find it surprising that it is much more difficult to enter a U.S. medical school (M.D. or D.O) than it is to enter a U.S. university graduate school to study for a Ph.D. or M.S. degree. Many U.S. medical schools give preference to legal residents of the geographic state in which the school exists, as they operate under instructions from the state governmental officials to 'produce' to meet the health care needs of the specific state. Eligibility for many U.S. Federal Government sponsored financial loans may well be defined by being a U.S. citizen, or a U.S. permanent resident ("Green Card"), or PERHAPS being designated sometimes as a 'political refugee', fleeing violence in their homeland."
"It is extremely difficult for international applicants who are not citizens or permanent residents of the United States to gain admission to American medical schools. State-supported medical schools rarely consider international applicants for admission, and those private schools that do accept applications generally require that international students place in escrow the equivalent of one to four years tuition and fees (U.S.$40,000-$200,000). Unlike undergraduate education there are virtually no scholarships available for medical school, and in order to qualify for U.S. government-sponsored loans the applicant must be a citizen or permanent resident of the United States."
Here's a list of all the medical schools' policies regarding international students, in case you're still interested -
http://naahp.org/resources_InternatMed_Article_June09.htm
I think a better approach would be to hone those problem-solving skills and take the gamsat

. US med school admissions consider the MCAT score, gpa, interview, recommendations, personal essay(s), relevant extra-curricular activities and/or personal experiences, completion of prerequisite courses, etc... It's basically a long process!
Hope that helps a bit, good luck ~
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