This mod will give vehicles in GTA IV a very minor deformation in hits (what else should I call ?) like in GTA V and the vehicles will catch fire very easily like in GTA V. but however this depends on what speed you are going, what is your vehicle, what you hit etc. OVERALL ALL THE VEHICLES IN GAME WILL GET MINOR DEFORMATION LIKE IN GTA V ( See the screenshots)

Installation : copy the file to Gtaiv/common/data and replace if asked.