Joining two maps

Is it possible putting two created maps into one?!? Because I'm making a new map (New Glendale - better version of it) and when I release the new version (hopefully), I wanted to join with Glendale Town, so is it possible to join them?!? If it is, how? Thank you

Yep, that works, but it's not easy. This guy here managed to do it: https://omnibussimulator.forumieren.com/t5025-seaside-city-wehlen-driving-test-all-in-one-news-s15
Maybe you should talk to him

Thanks, Jan. I'll try