call signs

I have three questions.
1. When I see a plane in the sky it says project ai boeing 737 etc. How do i change that to an airline like US Air or Delta, ai packages that I have downloaded?
2. I downloaded the Air Tran package and my atc uses citrus when referring to the airline. Can I change that?
3. When I hear the atc I never hear two airlines at the same time like US air or delta. Like flying out of Charlotte, NC I always hear US Air and not delta, etc. I know that Charlotte is a hub for US Air, but it isn't the only airline that flys in.
Also, I really would like to get rid of fs9 default commercial traffic. Any help you could give me with any of this would be great
Thanks a lot,
Will
1. When I see a plane in the sky it says project ai boeing 737 etc. How do i change that to an airline like US Air or Delta, ai packages that I have downloaded?
2. I downloaded the Air Tran package and my atc uses citrus when referring to the airline. Can I change that?
3. When I hear the atc I never hear two airlines at the same time like US air or delta. Like flying out of Charlotte, NC I always hear US Air and not delta, etc. I know that Charlotte is a hub for US Air, but it isn't the only airline that flys in.
Also, I really would like to get rid of fs9 default commercial traffic. Any help you could give me with any of this would be great
Thanks a lot,
Will