Hi guys I am currently in developmant of all the traffic of RIAT 2007 to add onto riat fairford scenery the complete show that will last so long then the aircraft wll either fly away or dissapear(not great) andwant to sell it as payware (only 50p or so) because i need the extra cash. All constructive comments welcome good

ok what if i made it and asked for donations but made it freeware?

As a rule of thumb most of us are not going to buy anything without knowing exactly what it is, how good it is and will it improve FS without hitting the frame rates to hard.
  If you are so intent on trying to make some pay ware you need to consider letting some one who will test it for you then write up a review for it so others can see what it is they are getting.
And like the other post said you can not just go and use someone else's aircraft without there permission. Most if not all of the existing AI aircraft are indeed owned by someone that would not like the idea of you just using there aircraft to make money with. And I would also bet that most sites would not allow you to put your programs in there libraries knowing that you did not have there permission.