I had in my possession both {EDIT: Trainz Driver} and trs06. I was wondering if there was a way to combine everything into trs06. There are a few scenarios/sessions on the raildriver that should work with trs06.
I imagine this would be highly unlikely. Not having rail simulator myself I can only voice an opinion - not fact -but I imagine both simulators would use different file formats and the object meshes would presumably be interpreted and rendered differently by each game engine, making content for one game incompatible with the other one.
Probably not the answer you were hoping for and I am certainly open to correction from someone more knowledgable, but I just can't see a way it could be done.
I think that there may be some confusion with names here. The first post talks about combining raildriver and trs06. RailDriver is a hardware controller.
The second post talks about rail simulator which is from another company.
I think the first post may be talking about Trainz Driver and TRS2006