How to install Client Side Car Mods easily?

So i want to replace some cars, but only on my client. I want the usual cars on FiveM servers to be replaced by mod cars.

Whats the easiest way to do that? Most tutorials i saw were insanely annoying where you need to take aparat half the game folder just for one stupid car. Isnt there a drag and drop tool where i can select the RPI files and the tool adds them to my FiveM mod folder without editing xml files and such?