You wouldn't be able to model it appropriately anyway, since you can only push around verts. I suppose you could make the arm and fingers 'thinner' and then try some wicked texture work to cover up the fact that it's still shaped like a regular arm... Not something I'd want to undertake, though. Lots of effort for what ultimately still won't look right in the end.
yeah well could it be made so that the pc uses an implant or an clothing to change he/shes appareance-model
in the way that he/she would have jedi/sith robe whit Cybernetic arm..?
so that it would need only model modifications..?