Thanks for your information. Seems you have good knowledge. Can you share some with me too.  Well I got my H1b approved, but still I am in OPT and my H1b will start in December as written in the paper send by USCIS. So do I need to wait till december for applying my green card or I can start process now?. As quoted by danphe do you think I will be able to get green card in a year. 

Thanks

M.N