If you use the Modcube
 

If you use the modcube would you also need to use a game shark or is the modcube the only thing you would need

found at : ####://www.gamegizmo.com/modcube.html/ :

IMPORTANT: The ModCube / Neo Key requires a Game Shark 2 (or Action Replay for European systems) to play PS2 backups. You do not need the Game Shark to play PSX/PS One backups.