Thanks for all the feedback.
jotajota: Yes I know this thread. It´s a similar try, he used some kind of muscle-spheres to block out the shape for unified skinning.
Stephen Casey: In the case you want to pose something like this, I´m afraid there is no way around a pretty good 3d animation program. Some of the programs I know have the ability to squash and stretch geometry based on joint rotations/transformations.
aminuts: Oh, yes… you´re so right. Patience is really required for a project like this … I hope I will finish it 
Anatom: Thank you very much. I´m glad you like my work.
Yes. the muscle-chains are not really attached to the bones. As far as I know there is no way to close a zsphere chain. There might be a script for this, anybody knows more?
Don´t worry… I will post updates
Again, thx for your comments guys, this really is a good community. 