Need help with a script to give user trains a route

[Fisherman82]

Due to the span overflow problem user made trains are basicly unusable because the lines that illustrate the routes in the Mission Editor gets saved into the miz file that gets a big filesize and causes DCS to crash.

Is it possible to write a script that is run some seconds into a mission sending the trains on their journeys along the railroads to points described into the script? 

If needed I would not mind using MOOSE or MIST.