The scenario:
When word starts, it connects via vba to a Service, which returns a list of paths. Each of These paths points to a .dotm file. These files contain information about various controls (inside the ribbon, for example a butto which adds a specific footer).

What I want: I need a possibility to load several .dotm files, but without copying or moving them to a specific location. 

Basically that's it. I've searched wide and far and I have the fear, that this Approach is actually not possible, and that I have to copy all dotm files inside the startup-folder and let word do the rest

Is there any way how I can load several dotm files into a single word-file, so that the ribbon gets extended depending on the dotm's

Best regards, please and thanks :)