I haven't been able to find anything else regarding this issue. Using latest version of USB Loader GX on a 4.2U softmodded wii. MM starts fine booting with IOS222, and have made it all the way to the Mech Boss in the snowy area of sector two. However almost immediately after I land the killshot, I receive a disk read error akin to what was received after the tutorial without IOS222. This has happened 3 times now.