[solved]how To Create Timetable Or Scenario Using Existing Routes

I want to make realistic amtrak scenarios using the all the routes that I have with AI train traffic I know that I have to use the builder but after that I'm lost. So if anyone can let me know what I have to do I definitely appreciate it

 

Be sure to check out DTG Matt's brilliant tutorials. Can't put that in a written post. Monkey see monkey do

 

I appreciate it