Select "Career Mode" at the main menu, then "Multiplayer", then "Host Game". Use the following settings:
The game will be waiting for the server. Simply start the race and finish it.
 Try to take the corners without hitting the them. It you do not lose too much speed, you should have a good chance to beat the time. Use the lap before the one you want to beat the time with to get Nitro. Use it at the end of the first lap in order to start the next lap at higher speed. Consider using a care with a better Turning value to make this easier.
 Challenges will reward you with about half of the cars for free. Money will be required to purchase the remaining cars. The best way to earn the required amount of money (10 to 12 Mio) is to upgrade a car, for example "Black Mamba", from "B" to "A" and play in multi-player mode. "A" level multi-player races are easy to win. With an upgraded car (level A), you will suffer minor (level B) damage. Your repair costs will be halved.
 Set up a race against a full grid of twelve cars, which can be human or CPU players.