Installing Aircraft (possible AI Problem also)

Hi Everyone,
Everytime I install a new aircraft, I'm given an error message the first time I try to select it in the fs2002 menu. It says something to the effect of:
'aircraft model not in library'
I have no Idea where this library is, and didn't really care untill recently because the planes work just fine regardless.
The problem is that I can't use any of them for AI traffic. I've been successful at setting up a flight plan for a repainted default plane, but as soon as I try to put a 3rd party plane in there, it doesn't show up.
I thought the two might be connected. Any thoughts?
Dwight.
Everytime I install a new aircraft, I'm given an error message the first time I try to select it in the fs2002 menu. It says something to the effect of:
'aircraft model not in library'
I have no Idea where this library is, and didn't really care untill recently because the planes work just fine regardless.
The problem is that I can't use any of them for AI traffic. I've been successful at setting up a flight plan for a repainted default plane, but as soon as I try to put a 3rd party plane in there, it doesn't show up.
I thought the two might be connected. Any thoughts?
Dwight.
