I have the PAL version of that game, SCES-52423, disc mastering code A0100524642-A511. What files show up if you browse the disc on your PC? There are no hidden files on my disc, are you sure there are on yours?
My disc has these files:
Code:
275345 2003-10-22 11:01 ioprp300.img
1340716 2004-04-17 06:41 sces_524.23
1533857792 2004-04-17 06:39 sxp0.x
589824 2004-04-17 06:41 sxp1.x
50 2004-04-18 08:47 system.cnf
The ISO image of my disc is 4,196,859,904 bytes long. All the "extra" space is just zero bytes.