Adding upgrades to cars that cannot natively accept them (like some traffic cars) can cause the game to crash when entering free roam.
For the most comprehensive "Unlock All" experience, many players prefer the mod. By editing the NFSMWExtraOptionsSettings.ini file, you can change ShowAllCarsInFE and UnlockAllThings to 1 , which permanently unlocks everything in the front-end and career menus. Risks and Tips Adding upgrades to cars that cannot natively accept
is the most reliable way to unlock all 100+ cars and all parts directly within the game's menu. Installation : Download the mod and copy the dinput8.dll file and the folder into your game's installation directory. Configuration : Open the NFSMWExtraOptionsSettings.ini file located in the folder using Notepad. Unlock All Cars : Find the line ShowAllCarsInFE = 0 and change it to Unlock Everything : Find the line UnlockAllThings = 0 and change it to Risks and Tips is the most reliable way