Thanks to both members for replying.
I have DVD43 on my PC, and that seems to help with the copy protection problem. I have used ImgBurn a lot, and only with DVD back-ups, and haven't yet had a problem until today. I tried cleaning the one disc, and it still had an error at 9% during the build process. I also went to my friends, borrowed his copy of the same film, and it has just done the same thing at 9%. Should I give up, or does anyone else perhaps have a suggestion for me?
Thanks!