Would it be possible to get copies of the FS2002 Pro aircraft to use in my AI?  I don't need the flyable aircraft, just the AI so I can add more traffic.  I'm running FS2002 on a 2003 computer which can't take on add-on like Ultimate Traffic or any program like it because the memory will stall out.

FS2002 comes with non-flyable AI aircraft. 

They are designed to be low resource - no cockpits, just shells that are visible from outside.

I've never felt a need to add any other AI.  I don't know if you can turn the included flyable aircraft into AI.  But you would probably use just as much memory doing so as adding a third party addon.