I just wanted to share what is, hopefully, the end of my story. So on Monday, I'd had a really bad day. Nothing really bad happened, but I was just really tired. Turns out I was about to get really sick, but I didn't know that at the time. And all day on campus all I could think about was playing video games. I got a text message from one of my roommates saying that I had mail, and I hoped that maybe C3PX's memory card had finally come in, because he was generous enough to send me one he doesn't use anymore. So I hurried home, and I saw the envelope on the kitchen bar, and I picked it up... and there was another one under it! It was another memory card from the eBay guy! See, I had received my replacement before I had sent the old one back, but I sent it back anyway, specifically saying not to send another one because I'd already received it. Apparently, he didn't notice. So now I have three memory cards: the second one that doesn't work, C3PX's, and this new one. But anyway, I started using C3PX's, making sure only to use the second memory card slot. I don't know how I've had this kind of time this week, but I've been flying through the game, already about 18 hours into it, just starting Disc 3. I guess I've been making up for all the lost time from having to repeatedly restart it. So thanks to C3PX for the memory card, and thanks to everyone else for listening and giving advice!

EDIT: And I've noticed that I've said the word 'memory card' enough times that I'm seeing an eBay banner offering PS2 memory cards. No thanks. ^_~