Just got Final Fantasy XI Online for my son's BD (off Ebay), he has a new PS2 slim style (SCPH-77001. He got himself a new console after his other slim one's laser died (it has a Matrix Infinity in it), but he didn't want to mod it..so he could play online games. Problem is, this game requires a HDD. How do we go about putting a HDD on his unit so he can play this game? If he gets a external USB case and a normal computer HDD and plugs it into his USB port, will this work? If this is a repeat question, I apologize, I have looked at alot of posts but just not sure if they are relevant and not about unit's with a mod chip installed. I've read about this HD Combo add on, but is this just for a console that only has a mod chip? Any help clarifying is appreciated!