I have several years of film that I have imported into iMovie - different projects for each tape. What is the best way that you have found to organize your files for burning to iDVD? I want to make sure that I can maximize the content on a DVD, but also keep the subject matter somewhat consistent and/or chronological.

Is there a way to import edited movies from one iMovie project to another? Is there a way to create an iDVD project with movies from more than one iMovie project? I could import all of the clips into a single iMovie file, then add my edits, then add bookmarks to mix and match for iDVD. However, what will the performance of iMovie be like with one giant project? Any advice is appreciated.