Require help with my models.

I’ve currently got my models that I want on my computer, textured and they have bones currently on it!
I however want to be able to make it so players can use the model as a skin or it can be used as an NPC.

Ragdolling seems easy enough it’s just in the line of animations and transferring to NPC.

The models I currently have are the ones from Metro 2033, really nice models, I have all of them except nothing to do with them.

Thanks for your time and consideration.