Thanks for the response irishmark, I will do as you suggest and check the project settings. I didn't expect DVD Architect to render again before burning but assumed that it was normal as I hadn't requested it to. What is the best programme for burning generally...DVD Architect or Nero? From what I can see DVD Architect is for the more advanced user and Nero is a bit simpler to use but what difference should I expect in quality once I get the settings right?