DVD SP can't find some files-won't start

Question

When I try to open a major DVD SP 3 project, which worked last week, DVD SP states that it cannot find some files and that the project cannot open without them: "The movie file "Sequence 1-FIN-00000005" cannot be found. Without this file, the movie cannot play properly." I have to Force Quit DVD SP and cannot open the project. Other files complained about include 1-FIN-0000003b
Since I last opened the project, one of my external Firewire hard drives has failed - it will not switch on or run up or mount. That HD contained the scratch for FCE from which the movies (.mov) files for the DVD SP project were created.
Could it be that some of the movies that DVD SP can't find are Reference Movies which rely on a Sequence in one of the FCE projects on the faulty disc, which would explain whey DVD SP can't find them?
If so, how do I recover from this? The originating FCE scratch disc is lost, being on the failed HD. How can I force DVD SP to open the DVD SP project and THEN complain? That would allow me to delete the missing movies, recapture the shots from my camera into FCE, run the FCE project (which is on my internal HD), output the movies again but as stand-alone movies, and reinsert them in DVD SP's Assets and rescue the project. As it is, I cannot even identify the movies that DVD SP complains about
Help! A serious problem.

Answer 1

SOLVED! I can now get the project to upen by tricking DVD SP into finding that the files are MISSING rather than that they are REFERENCE MOVIES which cannot find their "parent" Final Cut Sequence. Here's how:
Examine all the QT movies that the troublesome DVD SP project needs acces to (they will be in your Media folder). Open each movie and if QuickTime can't display any of them by reporting that it cannot find a file called something like "Abcde - FIN-0000008", that means that the movie is a reference movie, which means that it depends on the Sequence in your Final Cut project file which created that reference movie. That is perhaps because the Final Cut project file or its sequence has been deleted; or (in my case) the relevant Capture Scratch hard drive is kaput.
For each such reference QT file, add an "x" (or something) to the file name in your media folder. (A clue about which QT files are reference movies is an unexpectedly small file size.) Changing the file names like that will result in DVD SP failing to find any trace of them them, one after the other, but this time it will continue to open the DVD SP project file until it displays a box listing the missing file names. Press "Continue" and the DVD SP project file will complete the opening process. In other words, DVD SP will refuse to open a project that needs REFERENCE movies which lack their parent sequences, but will eventually open a project with MISSING OR WRONGLY NAMED movies. You should then re-create the movies as non-reference ones, perhaps after re-creating your Final Cut project or re-capturing the shots from your camera.
This is an important discovery for anyone who has inadvertently created reference movies and lost his/her Final Cut Project File or Capture Scratch. Without it, you will loose your DVD SP project and many earlier versions of it. So, never check the box called "Make reference movie" when creating a movie from Final cut.
Whew!
However, I think that it is bad programming on Apple's part to create a situation when a file has to be abandoned unecessarily like that. DVD SP should treat orphan reference movies like it treats missing movies and just complain and get on with the job of opening. It's like my car refusing to move for ever more because, just once, a door wasn't properly shut!
I can't think why I did not keep a backup external HD for my Capture Scratch. I've got one now!