Archiving Your Project
Ordinarily, iDVD doesn’t store any videos, photos, or sounds in your iDVD project file. It remains a tiny, compact file that stores only pointers to those files elsewhere on your hard drive.
That’s why, if you delete or move one of those media files, iDVD will mildly freak out.
In early versions of iDVD, you couldn’t transfer a project from one Mac to another for this very reason. And that meant that you couldn’t design a DVD on one Mac (one that lacked a DVD burner), and then burn it on another. You also couldn’t back up your project file, content ...