Because the game is now "abandonware" (though still technically copyrighted), the has become a vital tool for archival. Fans have uploaded save files to Internet Archive and Reddit (r/DriverSanFrancisco) to ensure that new players, who install the game via preservation methods, don't have to spend 40 hours unlocking content for a game that can no longer be purchased.
Installing a custom save file is a straightforward process, but it requires navigating your computer's hidden system folders. Follow these step-by-step instructions. Step 1: Backup Your Original Save Data driver san francisco 100 save game