Hello @ByteC,
I haven’t tested Medusa Nodes with the Blender 4.0 yet. This is going to be a little task for the upcoming days.
Hey @hamdullah_guclu
I see the issue. Thanks for the demonstration. As you mentioned, there is no such node group in your case indeed. I will investigate that. For the a quick fix, you can try the following:
Instead of searching for the “Surface Deform” group, add a new Geometry Nodes modifier and create an empty node group. In the node editor search for the “Deform Curves on Surface” node and connect it to the graph.
Here is a short demonstration:
I hope that helps 
Hello @It_will_be_okay,
As for your question: the addon doesn’t support such a workflow out of the box for now, although It is doable, it requires a little manual work.
I made a little demonstration with some extracted edgeloops, you can check it out.
There are some jump cuts and the video quality is not ideal, but I hope it is understandable. Please let me know if it works for you.