How to add driver, passengers and loads to mod cars?

Hey guys, I'm trying to use the mod called "Driver, Passengers and Loads" on modded cars.

It works perfectly for normal (in-game) cars, but when I want to add them to modded cars, like a modded convertible Sunburst, I don't see the option in the "additional modification" vehicle configuration menu.

I've been trying to do this for quite a long time. So if anyone know how do achieve this, please let me know. Thanks

 

Good god what game version are you on
0.24.1.1 is the current one

 

I'm at 0.13 (2017 version), but that's just to get even more compatibility for other mod cars.

 

yea

yeah, somehow you put the dummies in cars that don't support the mod that would be cool to have dummy's