Anadin, bear with me here, lets say we want to make a simple rigged Jacket model that can be added or removed easily.
Once you got your default UE4 Man into blender (with your settings), and made your modifications (lets say you keep the rig, add a simple jacket model and rig it with automatic weights, then delete the Man geo so only the Jacket and Rig are left.
Now you do all your settings you get it back into UE4 but when you import, you have to have all your settings + in the first category “Mesh”, you have to pull down the “Skeleton” entry and select the existing UE4 skeleton (because we are adding a jacket to him). Next, after your jacket is imported, you would go to the UE4 Standard Man inside of UE4, open his Mesh window, and on the Mesh Details panel, you would pull down the option for “Additional Body Part > Add Mesh” and then select your newly imported Jacket. Now switch over to the Animation tab and play through a few of the default animations and see if the jacket follows along nicely or is completely messed up???
If you can get that working properly let me know, that is specifically what I am after, I have no problems with anything else. My first try using your settings and methods still doesn’t work for this, I’ll try again some more later. Let me know, thank you so much.