SubSurf and armature setup?

I’ve setup armatures for my litle pet. Now I need help setting it up with the mesh.

Thanx in advance. 8)

Select your mesh enter Edit mode create a new Group with exactly the same name of the bone that will “affect” it, select the vertices that will move with the bone and press the Assign button.
Repeat these steps for each bone
All the verts must be assign
Is this clear??
Bye
António