Instructions
Insert the SD card into the SD card slot on the front of the Wii.
Turn on the console. It will boot to the Wii Menu.
Select the "Wii" icon in the bottom-left corner. Select by pressing the "A" button on your Wii remote.
Select the "Data Management" option in the screen that appears.
Click the "Channels" button. A new screen will open displaying all of the games currently on your Wii console.
Select the WiiWare channel you want to transfer. Click the "Copy" button. Select "Yes" in the confirmation prompt to copy the WiiWare to your SD card.