Instructions
Select the "Option/Settings" menu on the game's main menu. Some games allow you to open this menu within the game itself by pressing the "Start" button and selecting "Option/Settings."
Select "Controls/Controller Settings" or a similarly titled option. Most games will display a list of all the game's controls, usually separated by categories such as action and movement.
Select the "Left" and "Right" steering controls on-screen and press the "X" button (may vary depending on the game) to initiate a change. Press the "Left" and "Right" buttons on the directional pad respectively to assign those buttons as the steering controls.