gmax aircraft - I NEED HELP PLZ

Right i have got fs2002 standard so therefore didnt have gmax with flight sim i downloaded gmax though through a web site i then got the makemdl plugin and put that into gmax i produced a plane and exported the file to a .mdl file i then found out wot to do next which was to produce the 4 folders of a plane (model, panel etc) i was then told to copy sound and panel cfg files to the appropriate directories and place a .air file and an aircraft.cfg file in the main plane folder and edit it to read it as my plane. So i did all that then when i go into flight sim it lists it in the list of aircraft but when i select it fs2002 closes and i dont no wot to do to get the aircraft working does anybody no wot to do and how to help me plz!!!!!!! thanx 
