thank you for the reply...what is AES?...keep up the great work ya do
It's an addon from Aerosoft that allows ground services and animated jetways for FS9 airports, that usually don't have any other way to allow them, it has a list of supported airports, which includes JFK, and in order to use it an any airport, you must pay a variable amount of money as AES credits, which changes depending on the airport complexity (JFK is in the top-tier price, at 5 credits).
We have a similar product in FSX, which is free for all our airports, and works everywhere else if purchased (one-time purchase), which is GSX, but it's FSX only and there's no FS9 version planned.