Just smacked my PSX copy in my PC, and it looks like indeed there is a scene.bin file in the "BATTLE" folder and it`s the same size as its PC-equivalent as well. So I suppose if you copy all the contents of the PSX cd onto your hard-drive, replace the scene.bin and then burn the contents to a new CD and put it in a chipped PSX or use an emulator, it could possibly work.