I have a G4 Powerbook running OS X 14.4, 2GB Ram, 1.5 Ghz processor. When rendering or exporting it takes soooooooooooooooooooooooooooooo long. It's been like this for a while, taking at times 12+ hours to encord an mpeg2 file for a dvd and a few minutes to render clips with filters and transitions. What can I do or check??