Instructions
Open up the "Game Name List" at your GameShark's main menu. If you see the name of the game you want to cheat on listed, skip to step 2. If your game is not listed, select the "Add New Game" option at the top of the screen and use the on-screen keypad to enter in the game name manually. Press the "Start" button or select the "Enter" option on the on-screen keyboard to continue.
Select the name of your game from the "Game Name" list. Use your cursor to select the "Add New Cheat" option. Use the on-screen keypad to enter in the cheat description, then select and execute the "Enter" option on the keypad. A new entry box will appear with the characters you will need to actually enter in the code.
Enter in the code you want to install in the new dialogue box on your screen. Make sure to enter in all characters exactly and double check for errors. Use the "Enter" option on the on-screen keypad or press the "Start" button to save your changes. Installation is now complete. You can now activate the cheat as you normally would and begin playing.