First enter the code UNLOCKALLTHINGS in the code entry menu at career mode. Then exit to main menu and load your alias.

You should have unlocked all tracks, cars upgrade parts and get 4 cars (240SX, Cobalt SS, Pontiac GTO, and Viper SRT10).

Just build a super car for drag, and speed. Learn how to wheelie and you can face Ryo directly without having to race anything/anywhere else.