So, open handling.dat and find 'Infernus'. In this example, we suppose that in the readme there is also these informations:
Be sure that file isn't 'read only' (in properties). File is located \Grand Theft Auto IV\common\data folder. Handling.dat contains informations about vehicles. To modify these files, you could use Notepad already installed on your PC. IMPORTANT: backup your original (or already modified) files, as we said in the GTA 4 modding introduction. All these files are located in \Grand Theft Auto IV\common\data. If in the readme there are information on handling.dat, vehicles.ide, carcols.dat or others, you must follow next steps. Make sure you backup the original files Installation: Navigate to the common ext and replace american. If there are information on handling.dat (or carcols.dat or similar files) follow next steps. Anyway, as you would expect from a car designed to take the place of a Ferrari, the Turismos handling and top speed are phenomenal, allowing the player to set.
