Things You'll Need
Instructions
Download the "Preloader" files from the site in Resources. Double-click the downloaded file to unzip.
Insert an SD card containing at least 1MB of free space into the SD slot of your computer or SD reader. Copy all unzipped files to the root directory of your SD card, then eject and remove the card.
Open the small door on the top of the Wii to access the SD slot. Insert the SD card containing the "Preloader" files into this slot.
Press the Wii's "Power" button while holding the console's "Reset" button to display the "Preloader" boot screen.