In gaming terms, a trainer is a third-party program that runs in the background while you play. It intercepts the game's code and modifies specific memory addresses, allowing you to activate cheats that are not natively available in the game's menu—such as infinite Nitrous, instant cash, or unlocking hidden vehicles.
If you want a less intrusive experience or cannot get the trainer to work on Windows 11, consider these options: nfs underground 2 trainer 1.2
The race began.