I just Beat The GMAT!

I started to study in september. French. Lived and worked few months in new york few years ago. Didn't practice math for long. Wasn't easy to get back to it. Started around 550. I worked for two months and took THE test : 540, 30% in math, very disappointed.

I hired a teacher. I had the impression to work but after three months, I did 610 on the official test ( 55% math, 70% verbal)... Again, a huge deception.
I was scoring from 630 to 660 on Manhattan Gmat and did a 640 on gmat prep few days before the test. (pretty balanced 65%/70% on quant and verbal). I was almost working full time on the gmat. I decided to work part time since march to not go crazy. Working for an investment fund in the morning and on the gmat on the afternoon.
I now have exactly one month until my last shoot. I need a 650/660.

All I can see on the forum for such a short time frame is a "one-month-plan-from-scratch".
Does anyone have read a story close to this one ? If so, could you please send me the link ?
Do you have any plan to suggest ?

If I can help anyone with study materials do not hesitate to contact me. I start to have a pretty good experience in this filed ...

Good luck to all of you.

Paul