Ahh.. good idea, but sadly that is impossible :P
because arms and legs are common part(for example, arm00 file is no weapon position, arm01 file is rifle handle position.. and so on), not the individual parts. so if I modify arms or legs parts, all of characters that parts will changed. that's why it's impossible.

and.. actually I meant that advice to me about her face design, not her body design exactly;; hmm.. still I'm seriously confused about it

but hips.. widen the hips maybe possible!.. if her body skin extended :>