Okay, so:
I got my WiiKey working, which is good news. I loaded up my first game and noticed that I was able to play NTSC isos on my PAL board. I put the NTSC version of Luigi's Mansion on my SD card and tried to load it. No luck. I thought it must have been the rom, so I downloaded the PAL version. I loaded it up but it still didn't play. I never get past the (Nintendo) screen whereby the "An error has occurred. Check the GameCube instruction booklet for further information." error occurs.
I think im might be the ROM i'm using. Or is it something else?
Does anyone have a link to a working ROM they used?