I had a 3.3uv1 system. According to my understanding, the game will try to load ios on the system first. If it can not find the required ios, the game will try to load ios from system update partition at the disc. So if I don't have the corresponding ios at the system and i run the game from the disc, it will be fine. But it won't be fine and will turn to black screen, if i run the game using usb loader, because the usb loader will delete the system update partition and only load the data partition. So updating new ios is necessary for usb loader, but not necessary for disc loader. Am I correct? Thanks.