Go into the route file of the route you are running the train on and in the first few lines there will be a sentence saying Route.Change 1 Change the one to a zero and the train will start shut down leaving all the startups to do manually.
To add to what bvedmu said, this is a deliberate feature which allows route authors to select the starting condition appropriate for a particular service, either:
- control desk shut down, engine stopped, or - control desk switched on, engine idling, headlights set.
You will see it used when the new version of Maybank arrives sometime in the next few weeks.
I thoroughly recommend printing out the 13 page manual. There's more to the starting up and shutting down features than you may straight away think, i.e setting up the DRA, lighting up the controls using the reverser, setting head/tail lights etc.
I tried to do it without the manual. I was pressing randomn buttons and the train shut down. I was sitting there scratching my head, sipping tea when I realised the engines were off! Took me ages to work out how to turn them on. I recommend using manuals. I'm still try to work out simsig without it!