Any mods that you can set up ped spawns in buildings and load them in?

So I downloaded a police station that unfortunetly didn't come with Peds roaming inside. It feels very eerie and empty, so I wanted to change that. Are there any mods that allow you to set up peds with their own tasks like sitting and what not and save them so you can load them in whenever you are going into the building? If theres a way to edit a map to do this I would greatly appriciate if you pass on the knowledge. While we are at it, it'd be great to learn car spawns too so I can add spesific patrol cars to this station.