Admitting that I am not the brightest bulb on the ceiling sometimes I need help with these new addons that add ground vehicles and gates for airports. I have downloaded the AFCAD1.22(or latest version) and see files in the library for airport improvements. Now I would like to try a addon but am lost as to how do it. If one kind soul could guide me through it once I'm sure I can do it on my own after that .Thanks in advance.

I'm a little confused by your question. Do you want to add visible gates and vehicles to existing (default) airports? If so, then I would suggest Lago's Flight Simulator Scenery Enhancer (FSSE).They offer a free demo at www.lagoonline.com if you're interested. I believe that you can add five objects to each airport with the demo. I used it to add a couple of gates and some tugs and trucks to a few favorite airports and then wanted more the the five objects and decided to buy the registered version. Some folks don't like it but for me it's perfect. R-