My B-2 Visa expires in February/2010. I can not apply for the Student Visa now because I am moving of State. So I want to apply for the extension of my B-2 Visa and subsequently for the F-1 Visa. In this case the policy of changing the status into F-1 changes? Also, should I require for the extension of the B-2 Visa now or closer it's expiration?
Thank you.

