I was going to setup the ps2 for my girlfriend to play ff11 with me. Just wondering do I need to buy a mouse for that? And also, I already have the playstation hard drive (brand new), do I need to buy both the Chains of Promathia AND Treasures of Aht Urhgan expansions? What exactly do these do? Also what keyboard/mouse setup would you guys reccomend? Am I leaving any vital component out? Thanks guys.