Thanks so much for the advices.

I now have some of the answers, but also many further questions, if I may?

1. What is the basic bone structure compost of? For figures the hip bone seems to be the base bone. 

2. If I pre-groupe a mesh, how do I make sure that the conforming work properly? I thought, conforming depends on how similar the bone structures of both figures are, including weight mapping. 

3. Can a  conforming figure have additional bones for body parts who are not present in the original figure? I think of a wing suit, who have a basic bone structure like the target figure and additional bones for the wing flaps. Another example would be a set of tentacles attached to a external spine structure like the one from Doc Octopus from the spiderman movies.

4. Is there a guide or tutorial of the inner logic of Poser files and how to manipulate them in certain cases?

5. I read about backed in muscles in the Geometrie file. What's that supposed to mean and how is it achieved?

6. How important or necessary is Phyton script for content creators and what are the areas in which it comes into the picture?

To avoid this thread to go out of topic, here is my email address:

site email me for it

If I receive some useful information, links to written tutorials or videos, I will open a separate thread dedicated to this topic.

Thank you in advance. Greetings from Germany.