vertex groups created from rigging do not work I successfully rigged a high poly 3 piece model and upon skinning the model, the vertex groups were created for all parts of the model. However, the "Neck, Head" and "Hair" vertex groups while created are not recognized in "Weight Paint" and upon applying "Weight Paint" manually there is no effect?
The "Red" paint appears but does not allow heat, animation of the head or neck. The rest of the model works fine with "Weight Paint" and moves correctly. While I am new to blender what would be the best approached to this situation?

The model
When making a rig make sure that every part of the model has an Armature Modifier applied. This is easy when you Merge (CtrlJ in Object Mode) all of the objects you want to rig into one "big" object which means that you only have to apply the Armature Modifier once.

Another "feature" of Blender that comes to mind when thinking about rigging with custom weights is that the weigths are assigned with a vertex group. The vertex group's name has to be the same as the Bone's you want to bind the group to. You can always try to get away with automated weights or use them as a base for your own weightpaint, it gives a decent result most of the time.