Need to replace mesh on standart model

[32_Pistoleta]

Hi all!
I'm a newbie to all this modelling stuff, so maybe it's a stupid question =)

1) In Postal2 there're many NPC classes. I want to make my own NPC. I need to make new model, but I want it to use standart animation. Can I somehow made my model to use animations from standart Postal2 model?

2) Can I export skeleton/model/animations from unreal format to 3dmax/maya format?

3) Do I need an initial skeleton to build my own model for Postal 2?

Thanx in advance...