edit: OH FUCK, its F.U.C.K, and fuck sucks^^ I don't like this Tool!
I mean a tool which you can select a critter edit it.. and edit his look you know.. a much better one them fuck because fuck is not very confartable too, i think.
I would do all proto work with the official editor to avoid stuff ups. The only exception is that there are a few 'tweaks' that can be done with a hex editor (new calibre for example)