How it works: The Wii has two modes; a wii mode that lets you play wii games and a GameCube mode that restricts the access of the wii to its wii systems and lets you play GameCube games. While in the Gamecube mode it is almost impossible to access most of the normal Wii functions, and most importantly, it is almost impossible to access any homebrew application. The rungcbackup.dol copies the gcbackup launcher to memory and changes to GameCube mode and also patches the DVD read functions in memory, to make reading DVR-r's in Gamecube mode possible. This is technically able to block your wii, but will most likely result in you not being able to play GameCube games, but this can be solved in the future when a GameCube Mios fixer/restorer is released.
Before you do this instructable you need to already have The Homebrew Channel, DVDx, Wii backup launcher 0.3 gamma with cIOS7 on your wii.
Since the process to do that is long and since someone else already posted an instructable how to do that, follow this instructable before you start to do this hack.
Note that the WII backup launcher is unable to play Gamecube backups, that's why you need Gamecube backup launcher to play Gamecube backups.
I AM NOT THE AUTHOR OF THIS PROGRAM.
Wiigator (The actually author of Gamecube backup launcher 0.1 Theta/Xi and Wii backup launcher 0.3 gamma.) has a warning for all of us.
It is prohibited to use any of the software to illegally copy games, they are intended only to create and play legal backups of games that you own. In some countries or regions it is still illegal to make copies of games
that you own, check with your local authorities if you are unsure. I cannot be held responsible for any misuse of these programs. The use of any of the above software is done so at your own risk. If you mess
something up or anything undesirable (i.e.: loss of warranty, brick, lawsuits, jail time) happens because of any of these programs, it is your own fault. USE AT YOUR OWN RISK!!!!
If you have any questions at all it's better if you ask before you start messing with your Wii.