How can I add a new character to the game?

[PULUTUR]

I made a mod for boba fett where I changed his model and voicelines with my own.

 

Now I want to make a mod for my friend that's basically a copy of boba fett but added as a seperate character so that me and my friend can both play as our own mandalorian characters at the same time.

 

I saw some mods do this like the Greedo and Dengar mod.

 

Does anyone know how to do something like that? I basically want to duplicate boba fett as a playable hero with my own textures on him, so that me and my friend can play as the same hero, but just with different looks.