Finally the wii homebrew scene is more clear now, a better way to run code has been found though a game - The Legend of Zelda: Twilight Princess.
As wiili.org wiki says:
This exploit takes advantage of a buffer overflow in the game "The Legend of Zelda: Twilight Princess".
Originally discussed on efnet in #wiidev then put teh
The process requires than once you modify a save game it is signed with 3 keys!
Some info from Bushing:
"Once the Wii decrypts the save game, it checks its signature. Every Wii has its own private key which is used to sign save games, and when you save a game, the Wii actually saves three bits of data:
- The encrypted save game
- The signature for the save game (using your console's private key)
- A copy of your console's public key, signed by Nintendo."
Try this at your own risk, theres no guarantee that something won't go wrong.
Good luck and dont brick your wii!