Good question! The most critical part of the process you are describing is setting up the axes. All of your models will need to have the same origin point. This will allow you to copy and paste in place between files.
You don’t need to do the exploding and regrouping. You just need click through the MOG groups, copy the geometry/objects… then in your other file click through the MOG groups, and paste in place.
Let me know if that clears things up!