[quote name='rodeojones903']Not all games support progressive scan, and you need to hold X and triangle while the system is turning on to get the option to activate progressive scan. It is true that not all system support 480p, so if you are already doing the above you need to get a new system. If its a fat PS2, the box would have a yellow tab on the corner with a + sign in it.[/QUOTE]
The box with the yellow + just means that it plays 480p dvd movies. If you dont have the box, all fat ps2 models that dont have firewire port by the usb ports are the ones that support 480p for dvds. All ps2s fat, slim, launch, doesnt matter, support 480p on some games. GT4 has full HDTV 1080i support.