I would recommend against creating a bone animation-system from scratch using pinned sprites..
But you can pin sprites to image points using the pin-behaviour
and you can set the position of those image points in the image editor.
I'm not sure what pointers you are looking for..
A more specific question would be easier to answer.
The manual on this site is pretty good and there are many tutorials.
Also be sure to check out the examples provided with c2 in the new project dialog.