How to export Sketchup into Beamng Drive maps?

I know there are videos on how to create a sketchup object and importing it into Beamng Drive, but how would you import an entire map into Beamng Drive?

I've been wanting to experiment around with this, but after many hours of trying to find videos or even threads of this issue, I came up with nothing. Not only that, but there are also barely any videos regarding the new map UI, as all of the videos that deal with object creation have the old map editor UI.

This is just a small section of New York City that I want to turn into a map.

 

I think it's as simple as exporting it in .dae & then importing in the World Editor

 

How would I access the .dae file in the editor? The new UI for the editor makes it impossible to find the file. How would I access it though the new editor, like in the old UI?

 

I need help for the same reason: does anyone has the answer? Thank you.