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I've already given the GMAT once. I got a 600 (quant-49 and verbal-24). I'm giving the GMAT again this September. I have no sort of functional experience. I've a GPA of 2.6. I'm very good at organizing stuff and also I'm an amateur DJ, and vocalist. Also I know Spanish and French. I've done some social work too a la helping out the orphanage kids. I've also taught all sorts of subjects to the students up to secondary education level for two years at a local school. And also I undertook this really interesting project in my final year of Engineering, and thus I could get a letter of recommendation from the company manager. Would a 700+ fetch me a b-school of my choice (the top-50 of course I'm not including the top-15, because I'm sure I would get rejected because of no work experience). The schools which interest me are:
1) Ohio State University, Fisher
2) Carnegie Mellon University (Tepper) (PA)
3) Indiana University, Kelley
4) University of North Carolina-Chapel Hill (Kenan-Flagler)
5) University of Southern California (Marshall)
6) Emory University (Goizueta) (GA)

Please assess my profile and please help me out. I'm planning to apply for the round 1.