Applying for H4 extension in India (current H4 expired)

USA L1, L2 Visa
#1

Here’s my situation

My H4 expired on the 31st of Jan 2014 (concurrent with my husbands H1b). Now my husband has an extended H1b till Sept 2015. I currently live in India and need to get an H4 against his extended h1b. Here are my questions

  1. Do I apply for the extention in India? If yes what is the process. I got mixed answers from the internet some saying I need to fill in I539, and some saying I need to do the DS 160 form again.

  2. I am aware that I dont need to appear for an interview, so do I just send in my details to the local USCIS office and expect to get my passport stamped and returned?

  3. Is there a way that my husband can apply for my extension in the US? If yes, do I then need to send in my passport somewhere for the stamping again?

  4. Since my previous H4 has expired (date on entry stamp is Feb 9th) do I need to apply for a fresh H4?

Thanks a bunch for your help in advance!!