H1B, H4 Visa

Hi

I have been a reader of this form and would like to thank all the people who have been sharing their experiences
and helping those in need. My case is below

I came back from US in feb 2011 for h1b stamping and was given 221G as I was working on EVC model at that time.
I continued working for same company from March 2011 till now from India, I was working as a sub contractor
from India for them. Now, this company filed my h1b and it was approved.
Its an IN-HOUSE project which I will be working on.
I have filed my taxes in India from past 2 years and will be filing it this year as well.

I have few questions for which I need answers for. I will be going for my H1B visa interview soon. If the VO asks me below questions, what should be my answer

Ques. What is the duration of your project OR How long are your required there for this project?
Ques. Has you visa ever been refused/rejected ?
Ques. Do I need to carry my pay-stubs (I don't have any) or do I need a letter from the bank stating that I was getting my salary in my Indian account ?
Ques. How long you have been working with this company ?
Ques. What all documents apart from the regular one's, do I need to carry to strengthen my case ?

Kindly help me out .. Thanks a lot in advance .. Really appreciate the same.