You could create a memory card exploit and just backup and patch your game. I don't think anybody would tell you here to do that though, mod chip this modchip that
You need a thumb drive, memory card, original psx game, do a search for PS2 memory card exploit and get the generic ntcs->pal patcher from somewhere...
Everyone here will just tell you modchip though, I think because they sell and install them, just my opinion
There are other options, this forum doesn't talk about them, shhhhh!
You must be rather tech savvy to do this mind you, but your warranty will still be intact