I’m not 100% sure I know what you mean here, but I don’t think we label the actors it the world what they are in the patch with the MVR import. Might be something we added to 5.2? I’d have to look.
We don’t do anything to the BP fixtures just yet to change how they behave. You’d have to duplicate the BP actor, or make a child class and set it up how you want first, then replace with that fixture using the MVR scene actor.
The import is not necessarily going to choose the correct one by itself as it just does a very simple comparison of attributes. You’d still likely have to “match” them in the MVR scene actor, but it shouldn’t take too long as it would essentially replace each one of that “type” This could be automated with scripting if desired.