To an extra $10,000 in career mode have a Need For Speed Underground career game saved on your hard drive. After the prologue you will get $10,000.
Pay close attention to your tachometer when launching from the start line. Grab a perfect launch to gain a few precious seconds. When the needle turns blue drop the clutch and hold on.
Nitrous and grip:
Hitting nitrous torques the chassis back, giving the rear tires immensely more weight under the new acceleration. The end effect is that you will go straight. If you find your tail sliding out or are about to spin out of control, hit your nitrous. You will be surprised at how fast you will get straight again. This is a great trick in combination with Speedbreaker. With the correct timing, there is no corner you cannot take at any speed.
Enter at title screen: up,up,down,down,left,right,up,down
You will be able to use in the Backroom of the One Stop Shop