Things You'll Need
Instructions
Insert your original Rock Band disc into your Wii.
Select "Update Your Title" from the main menu.
Select the "Extras" tab.
Click on "Export Disc" option. Follow the onscreen instructions. There will be a charge of 400 Microsoft points to re-license the songs for use. You need to be online to purchase the license key. The songs will be added to your music lists on Rock Band 2.