excuse me i'm new in player modelin (i've been modelin weapons and objects). when i'm weighing the mesh do i need to envelope face bones to the face mesh or i don't need to make face mesh and just envelope cranium bone to head(with face) mesh? thank you.

it depends on wether or not you want the face to be animated like for SP, if not you only need to weight the head and face to the cranium bone. If you are weighting the facial fetures to move it's easier to use the paint vertex option than to try adjusting the envelopes, just adjust the size of the brush so it dosent' paint to many vertexes at once. Hope this helps!