merck12

My name is Farooq Irfan and I am currently in chicago from 28th october 2010 to visit my uncle on B1/B2 visa. At the aiport they have granted me 6 month stay. I applied to an school for an mba program before I came in here and my application is in process. I want to change my status from visitor visa to student visa and so I want to know if it is possible, how much are the chances, what will be the process and how long will it take me