Beat The GMAT a GMAT & MBA community

Hi,

I am an Indian IT professional with 7 years of work experience in a US based IT company (Almost 5 years in US) for different clients. My GMAT is not that good (Overall : 690, Verbal : 37 and Quant : 47).I don't have any significant (rather none) extra curricular and I am 31 years old (Not sure whether that can be a deal breaker). My undergraduate GPA was 76/100.
I have couple of questions.
1. What are my chances at Carlson/Tippie/Tepper/Johnson/Olin (Carlson is my first choice).
2. How can I differentiate myself from typical Indian IT crowd (You must have heard this question millions of times).

Appreciate your reply.

Thanks,
Nitin