Things You'll Need
Instructions
Click "Music Store" in the main menu of the Rock Band game. This option is not usable if the Wii console is not connected to the Internet.
Click "Continue" on the prompt that appears.
Press the "-" button to change how the songs are sorted. Songs can be supported by difficulty, song title, artist or genre.
Click the song title you want to download to your SD card.
Click "Yes" in the prompt to start downloading the song. The prompt contains the Wii Point cost for that song.
Wait for the song to download completely to the SD card. The Rock Band set list will automatically update to include the new song.