@JohnFromGWN So I managed to get the game working with all my add-on vehicles in the game.
What I did was took the gameconfig and added the one where it gives me the most traffic and peds.
But a new problem arises.
About 2 minuites into the game starting. Say I'm getting into a car or shooting etc the game would freeze for about 3 seconds and then go back to the desktop without displaying any error messages.
Any ideas why?