Hi Reiscool
The Loco Sheds is a driver Command for opening and closing the shed doors, I had a few problems with script getting them to work in driver with a CTRL/click, I couldn't get the menu to display, so I made a driver command to get by until I'm skilled enough to sort the problem.
MOW (Maintance of Way) is a command to make scenery objects apear and disappear, Buy using a Skip if Variable Command, I have set up about 60 MOW Vehicles and personel around the route, that randomley appear and disapper only 5 to 10 at a time every half hour to and hour so every time you drive down the track MOW vehicles are in a different position doing there stuff.
The same princple is use for "Crew Watch", when a train is in a passing loop, and another train goes by The engineer leaves the cab and and stands outside the train and watches it go by (as in real life) looking for faulty or draging equipment.
Also for the the Crew Van when a crew change is needed its uses a similiar proceedure
Cheers
Lots