John,
There's a non-wiring method to having any MTH engine (or lashup!) come up dark and silent on any powered track after the watchdog signal has come and gone.
From page 105 of The DCS Companion 3rd Edition:
If a lashup is powered on after the watchdog signal has come and gone, perhaps if its siding was toggled on after voltage appeared at the TIU channel outputs connected to its siding, there are two ways to put the lashup into DCS mode. One way to put the lashup into DCS mode is to turn off power to the inputs for the TIU channel that is connected to the track upon which the lashup resides, toggle on the siding and then re-apply power. The other way is to first highlight the lashup in the remote's Active or Inactive Engine list. Then, flip the toggle switch and immediately press the thumbwheel to select the lashup. It will come up in DCS stealth mode, dark and silent. This also works with individual DCS engines.
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