The Application Process

Hi, All

I am contemplating to apply full-time INSEAD MBA programme in Singapore.
Last wednesday, I took my GMAT and scored 640 (way below the INSEAD avg of 700).

A bit of my story:
My undergrad GPA (i graduated in 2004 from NTU singapore), which is still the biggest regret in my life until now, is only 2.1, simply because i was lazying around and got addicted to computer games. FYI, I ranked 1st for two terms in the most prestigious high school in my hometown Indonesia, receiving full scholarship for 3 years.

My poor grade has costed me dearly in landing a job after my graduation.
I had to take several part time jobs (such as teaching, being a waiter, and even painting house) to survive (my splitted parents abroad couldn't afford my living cost in singapore) before finally a globally-known semiconductor company put their faith in me in mid 2006 (approximately 2 years after graduation).
I learnt the bitter lesson, and quickly repaid the faith by inventing more than 130 patent applications filed around the world (in which 10 has been granted patent rights). I become the 2nd most prolific inventor in my company. I lead 2 task-force teams of 8 experts dedicated to invent new ideas since 2008.

I am planning to emphasize my work achievements in my MBA application.
Do you think I need to retake the GMAT to moderate my poor GPA?
Is there any other thing that i need to emphasize?

Thanks in advance.