Click the lady of your choice and read her bio for tips on creating her perfect car. Click again to enter the tuning screen, where you can choose and customize a car by clicking the arrows in the menu to the left. Choose music at the top and model-specific options in the menu to the right. When the car's ready, click Start Now. Hold Up to race to your lady before she loses patience, and then check out her rating of your custom car. If she likes it enough, you can move on to impressing the other ladies.