How do you make addon planes AI traffic?

Download TTools by Lee Swordy from the library and read the excellent file on how to accomplish what you are asking.

This is a simple, but multi-stepped process. As was said, you have to have the latest TTools program by Lee Swordy.TTools finds and decompiles the traffic.bgl file in the sim and allows you to edit it, thereby adding more aircraft and flight plans.There are programs you can download to make this editing process simpler than manually doing it. But at this time, I prefer manually editing my plans and aircraft insertions.Next, go over to FS times web site, www.cox.net/fs times.com and read the tutorials on TTools and AFCAD. It's all laid out well and easy to follow step by step.And once you're ready to start, you'll probably make a mistake somewhere. The BB is here to help. Rick