Modding (You Are Empty)

If you rummage through the folders of the game, then you can find models of those characters that are not in the game list: Butcher, diver, man with an oar, sow, pig, psycho 2c model, nurse 2 model, athlete 2 model, liquidator 2 model, (model like a fireman only) in a helmet and with ppsh, the texture remained from the cop and the texture was also from the pioneer, the grandmother with a sickle 2 model .... if anyone knows, can you help me to replace them with standard characters like the nurse's grandfather?