That's the trick. You need to convert your QuickTime movies into DV Stream format before you can import them into iMovie. To do this, you purchase QuickTime Pro. If you already have QuickTime Pro, open up your movie, select Export from the file menu, and select DV Stream as the file type. Then you can import it. Once you import the new file, you'll get a funky message, but just click "OK." The movie will be stored on your Movie Shelf.