Thanks for the information and the source file in unavailable now after almost a year the original electronic copy was deleted to make space for other stuff. Anyway thanks for the information on Imageburn I will give it a shot.
In some instances the DVD's copied repeatedly by Nero and other "name brand" software packages like Roxio, etc... don't do an adequate job if you want to do a 1:1 copy. You end up missing stuff and not having a good copy...in essence you get a coaster sometimes just like you do if you are ripping movies, audio, etc...
I don't think I will be doing a duplicator since I am not making copies for video production and besides if I wanted to do that I would drop DVD burners in an ancient SuperMicro 750 Server Case with a cheap mobo and processor and go to town.