can people make their own LHs in 3d max or something... or could you only skin them?

please anwer this, cus if its possible, i might make one

In theory yes.

In practice, only one has been done so far, and it's merely a unit redone into a head with regular head animations.

ok, cool..

could i make a head and then use the same head animations?

or

could i open the head in a 3d program?