Never heard of anyone havin that problem. With version 4 when U change the body, if U have it in text view it will tell U what body has been put on the car. If it shows the correct body, then the problem must be somewhere else, like maybe your gamesave file isn't getting overwritten on the mem card. The only other thing I could suggest is, if the right body is being installed by the program, but shows up as a trx in the game, export the car to an ini file and copy and paste it here so we can try loading it. If the prog is not installing the right body maybe try deleting the program and download it again.