I have a wiikey on my older model wii(doesnt have the chip), i had no problem playing any backups (region or non-region) until one game (Just Dance) gave me the disc could not be read error. i thought a system upgrade would fix this.... and when i upgraded, my region free games no longer worked. i have softmodded and use neogamma to run the games, but the one game (Just Dance) does not work reliably (works sometimes, some not), so i assume there is an issue with the disk that I have been using. i know that with the proper mods, i can do whatever i want. The issue is with my girlfriend (who is used to using the modchip and running the game from the disk channel), so i am wondering if there is a way to downgrade my firmware from 4.2U so everything will go back to the way that it was. if this is possible, i would greatly appreciate help with it, as well as any other options that I might have. I WOULD PREFER TO USE THE MODCHIP, BUT I AM AWARE THAT HBC IS POSSIBLE.