I'm not sure Wayne. I know I've been able to manually copy scenarios from Marias Pass and Pacific Surfliner to Marc's ScaleRail copies with success. I've really only done it a couple times because it's a drag to have to track down what folder contains the route I want. I'm not sure if a certain type of route editing may disturb the scenario file? Obviously track changes would cause problems but I don't know if that would cause the scenario to vanish or 'ghost' in the cloned route's list. Hopefully someone else knows more.
The RWA scenery upgrade is top notch!
Tyler