How the heck do I use this mod?

are there any skins or bodygroups to them?

Its harder to pose when the heads are separated from the body

Are you do liara and samara variants for pac?

Would you read the title+desc you'd know why.
Secondly I save MUCH space by doing it in this format.
(In my opinion, all models in GMod should be saved like this so they take less space)

umm.... i find it weird that the heads and the bodies are seporated.