Engine Cold and Dark Question

I have seen in Tim's tutorial how to get a cold and dark cockpit but am curious how to do when I am:1. Creating a flight in FSBuild, then using Gatekeeper.2. Loading flight in FS3. Then starting the flightWould I have to have the cessna selected, load FS, do the shutdown, and then change planes? Or is there an easier way?ThanksDustin Pearson