ok for the clone trooper's helmet, to make the bulge on the side of the helmet more pronounced like it is in this picture right here,



would i have to model or only skin, and if skin, how would i go about doing that?

You'd have to at model. I know skinning can't add anything to it, and I'm not sure if Hex-editing that is possible.

I'm pretty sure hex editing a .msh is only for adding or removing add on meshes such as cloth.