For your viewing pleasure here is a tutorial video:
InstallationOriginally Posted by Kotaku.com
You will need:
1x SD card, formatted as FAT16
1x copy of The Legend of Zelda: Twilight Princess that has been run at least once
1x Some way to read SD cards on a computer
(Optional) 1x or more GameCube controller
(Optional) 1x USBGecko
Inside the zip archive, you will find several savegame files; you will need to choose the correct one based on your version of Zelda: Twilight Princess. The easiest way to check your version is to compare the text string which is on the inner cycle of the data surface with the ones below.
RVL-RZDP-0A-0 JPN - rzdp0.bin
RVL-RZDE-0A-0 JPN - rzde0.bin
RVL-RZDE-0A-0 USA - rzde0.bin
RVL-RZDE-0A-2 USA - rzde2.bin
RVL-RZDJ-0A-0 JPN - rzdj0.bin
If it does not already exist, make a directory called "/private/wii/title/RZDx/" on your SD card; replace "RZDx" with RZDE, RZDP or RZDJ as appropriate. Copy the above file into that directory, renaming it as "data.bin".
Next, take your homebrew Wii executable, and save it in the root directory of your SD card as "boot.elf".
Now, put the SD card into your Wii and turn it on. Go into Wii Options --> Data Management --> Save Data --> Wii. Find your Zelda save, click on it, and click "Erase", and click Yes. Now, go into SD card, and select the "Twilight Hack" save (the icon says "Wiibrew Loader"). Click copy, and yes. Now, go back out of that menu.
Insert Zelda, and run the game. Load file A, and walk backwards.
Download the Hack HERE
More information HERE!
Download some homebrew HERE
You can now load homebrew from the internal SD card slot on the Wii no modchip or extra hardware needed just an SD Card and an SD Card Reader for your PC. I'm hoping for DVD homebrew soon if its not already out :P
EDIT: Fixed links added install info to post for easy access. The Wiibrew servers are over loaded so if the links don't work try refreshing or try again later cus they are not broken.