H4 TO H1 CONVERSION while spouse still in india


I am on H1B and i have a valid visa till October 2014. I have applied for my wife's H1B in the April 2013 quota and she has got her recipt number. I have the following questions.
  • My wife is in india, can she travel on H4 and later apply for COS when she comes here.

  • How long will it take COS to be done.

  • Can i apply for her COS before October this year?

  • Will there be any problems if her petitiion is approved while she is still in India, the consultant is not confident of she appearing for a PA in india.

Please advice.