AI placing and giving orders

Just like the title says, how do I choose a specific consist that I want to use and how do I give it orders? 

https://www.railworksamerica.com/forum/
https://www.railworksamerica.com/forum/viewtopic.php?f=18&t=14610
DapperDan wrote:Plus you could check out the tutorials that Bob made for creating a scenario. They helped me a lot.