Thanks to “pmiles” on Apple’s iDVD discussion boards, who posted the following steps to install iDVD 3 on a non-SuperDrive Mac from the iLife installer disc:
1. Insert the iLife DVD
2. Highlight the iLife Installer
3. Select Show Original from the File menu
4. Open the Packages folder
5. Double-click the iDVD.pkg
6. This should now allow the installation of iDVD.
Note: The computer MUST have at least a DVD drive (iLife disc is a DVD). You will need to update to iDVD 3.0.1.
