i know how to open studio but i dont know where to find stock models. like cars and zombies.

ik how to do this, i always do this when i  need models

epic tutorial:

1 - get the model from roblox.com

2 - if its not before 2014, put that in a game in the NEW roblox studio (if it is 2007-13 u can insert that directly in novetus BUT SKIP TO STEP 10)

3 - save the game 

4 - find a way to download fivb 11 or 2017 studio

5 - open the game and run a script

6 - go in the novetus directory, models and run the script SaveColor.txt

7 - save the game

8 - open that in novetus, i reccomend 2011 studio

9 - run script, same directory and LoadColor.txt

10 - if the model has roblox assets, run script same directory and FixAssetsLinks.lua

11 - right click on the model in explorer

12 - save the model

13 - close studio, novetus, home, world and universe and u r done

bey

PS: this is the converting maps guide from finobe wiki, i remember all the guide lol

it's been a while since i've looked but there should be a models folder at the root of your novetus installation containing some models and scripts