Team Twiizers have recently released a proof-of-concept homebrew exploiting the Zelda Twilight Princess Wii savegame hack. Apparently, they are working on an ELF loader (i.e. a homebrew loader for Wii).
ELF is an executable file formats, it will help creating homebrews.
Like it was said in this interview, this hack was NOT made to play backups without modchips and those who discovered it will never help to do it.