Hi, everyone. When i want to spawn a car with the mentioned trainer, it blocks the game and gives me a fatal error message. Can someone help me fix it, pls?

I have no clue what and how happened, but i'm so happy that finally it's done. Got the car. The problem is solved.

OpenIV is unable to change the original police car files with the police Chevrolet Camaro. Can someone help, pls?