Help adding the cut Engineer boss zombie to Call of the Dead

[TeleCreeper]

I have NO EXPERIENCE with GSC modding AT ALL but Ive been interested in cut content from cod zombies and Id like to be able to either add the cut Engineer to Kino der toten or to call of the dead as either a second boss zombie to george or completely replacing george. I know mods like the Renaissance mod add the engineer to kino but I dont want all the extra stuff that mod adds. I would just like to add the Engineer as a boss to BO1 in a way thats similar to how something like Brutus in mob of the dead works where he shows up every few rounds as a miniboss. Any help would be appreciated.