I like creating sessions, if you want, I could do it for you. Just send the route to the e-mail address in your PM, along with an idea of what you want the session to do, and I will create the session. I have done this for other route creators.
I am not sure what you are trying to do, but there is no "on" & "off" button that I am aware of. I use a lot of different commands to start stop AI trains depending on the trains mission.
I have run into that problem more than once, LOL. What I did was enter the "STOP" command as the first entry in all the trains commands. This seemed to fix the problem.
What the F*** is happening to Trainz, I am getting very upset with this sort of stuff not getting fixed, along with a lot of other things. It seems no one is reading this form to see the displeasure that gamers are having.