Viper Racing's replay, with the telemetry graphs and ability to monitor other cars, is an essential training tool and shouldn't be ignored. If you take the car off the track you can drive anywhere you wish. While I wouldn't exactly call this a feature, it does provide a greater sense of realism during the race. If you find yourself off the track and in the woods, you must actually navigate your car back to the raceway. Viper Racing comes with 6 tracks that can also be raced in reverse, giving 12 driving experiences.
Single races allow players to familiarize themselves with the tracks before taking on a career.
Other cars can be set for easy, intermediate, simulation or random ability. The AI setting determines the ability of the car to win the race, but not the intelligence of the driver. Simulation drivers drive faster. It's fairly simple. But every racer is dumb and this can become quite frustrating in Career mode.