i have an imovie project that i am working on that is about 8gb, and i would like to back it up onto dvd(s), but my drive doesn't support dual layer discs. is there any way in which i can do this? i.e. somehow split the file so it will fit across 2 dvds? p.s. i want to keep the project file as it is a work in progress, therefore exporting as a quicktime movie will not do the job.