You know, if the PS2 OS had a built in file viewer for the HD, you could easily do the same. All the relevant code is stored locally....

Basically, you should just buy whatever version of the game you can run. It cost me over $100 to get it working on my PS2, but it plays just fine. It's a lot of money for one game, yes, but my PC won't even run it. There's also now the third option of the upcoming XB360 release. If you want to play this game, just buy the version most suited to you. I'd say the technical quality would probably be something like this:

(worst) PS2-PC-XB360 (best)

So if you have a PS2 and a PC and plan on getting the XB360 and don't mind waiting for it, get that version. However, the PS2 version is still a perfectly good option for people like me who couldn't play the game otherwise.