Restoring iDVD files

Question

I created a DVD, using iMovie and iDVD, ending up with 6 movies in the iDVD menu window. Then, I moved those files (images, iMovie events and projects) from my iMac hard drive to an external drive. Now when I open the DVD project, I'm told (of course) that "the following files could not be found" and 12 missing files (audio and video for each movie) are listed in a window. The window gives me the option to "find file." That's more than iMovie does, by the way.
So I select the first file, and bingo! it's restored---but populates all 6 windows in the iDVD menu. I figure I can select all 12 files from the "missing files" window by using the control, shift, option or option keys, but nope, only one. And, once I have restored that one file, I cannot get the "missing files" window to reappear when I close/reopen the DVD, so I can select another.
My question is: how do I restore ALL those missing files? Thanks, John Nall
So my question is: how can I use the "missing

Answer 1

For anyone with this problem, I found my answer at http://www.peachpit.com/articles/article.aspx?p=1374783&seqNum=5
Some comments, though, on the solution: the Project Asset box will not update a missing asset symbol from a zero with a slash to a check mark--you have to double-click on the item to see if the Missing Files window opens again. If it doesn't, then you've restored the file. Also, although the Asset box might show that audio files are missing too, mine were restored when the videos were restored. Finally, if the movies themselves were populating the iDVD menu screen, they will still show a broken chain image until you save and re-open your iDVD movie.