Came across this pic (from a Wii kiosk) showing the Sound Menu from Excite Truck. It appears that you can use an SD Card to allow the use of custom music in the game.
Shows a ton of pics of the kiosk setup and Wii screens
http://www.penny-arcade.com/forums/viewtopic.php?t=1073838327&start=150
The music screen from Excite Truck
http://img.photobucket.com/albums/v43/DeadlyVenom/DCP02798.jpg
Shows a ton of pics of the kiosk setup and Wii screens
http://www.penny-arcade.com/forums/viewtopic.php?t=1073838327&start=150
The music screen from Excite Truck
http://img.photobucket.com/albums/v43/DeadlyVenom/DCP02798.jpg
