I have an actual copy of Gran Turismo 4 Prologue except it is set for PAL televisions and I only have NTSC televisions. In the past, I have had no problems converting games from Pal to Ntsc, occasionaly the y-fix wouldn't work but other than that I've been fine. Anyway, when I patch this game, the first and only the first menu screen works fine, with the y-fix working and the "lines" aren't visible. Every screen after this remains in the PAL state, that is they are black and white and I can see the screen refreshing. When I don't patch the .ISO and burn the game, I get the black and white problem and refresh problem on the first screen too. Apparently, only the first menu screen is being patched, while all other parts of the game remain unchanged. I have even managed to make it in-game and drive my car around, the sound works fine but my eyes burn after watching the screen for a few seconds, so this is not a boot problem. If anybody has any ideas on how to fix this I would appreciate it a lot!