@ RAMWolff

the way I understand you have an issue when you go to the Fitting room with the loaded La Femme and your outfit. if it is the case you will not see the models in there until you click on the command New to generate your first session! In your first session select your Object and goal click ok , after this action you will see the loaded models in the 3 Ports where you can fit the outfit and generate it as conforming figure.

There are also other ways to do it depending on the complexity of the outfits you are making like the setup room the groping tool and the hierarchy editor all of these offer the functions to create figures and conforming outfits using them in combination with the joint editor.