A dialog for File->Merge

[Fonte Boa]

Now, i understood the limitations to import multiple objects and the absence of a component to this: thks for the explanation.

About materials:
had you imagine Merge command just importing the materials but not applying them to objects? This was my first idea, considering i would use Merge command to import Materials, Lights, Palettes LIBRARIES, to use in the current wings file.

I agree with you: if user Merge an object but not the material, that object should arrive with default material applied.
But if user import both, Material and Object, it seems the more reasonable is to make the object arrives with material already applied (unless you create an option to avoid this).