How do you unlock the extra studio sets for PS2 version of Family Feud?

To unlock the extra studio sets for the PS2 version of Family Feud, you must first complete all of the episodes in the game, with the exception of The Final Feud. Once you have completed all of the episodes, you can go to the main menu and select the Extras menu. From the Extras menu you will be able to unlock the extra studio sets.