After some more nice & friendly hate messages, screw the haters, here is the basics:
I found this method out myself without the help of others, so i don't need to give credit to anyone.
First the car you want to rip the mod parts from, needs to be saved into Mike's home garage or Trevors. Then you quick save. 'doesn't matter if you quick save inside the garage or outside' Now you export it to usb, open it with the save editor, click blocks, extract PSIN. Open that file with a hex e