Thanks Mark, that was very helpful.
I do have an assistant that works with me on a sales desk, she would be the one operating the duplicator, in view of your advice I am now thinking perhaps I could do this with 2 DVD recorders, if I had one and sent her the un finalized DVD my thought is she would have plenty of time to finalize the DVD in her machine (same as my recorder)before doing the duplicates, I have never tried this so not sure if it would be efficient in practice, but I have to keep it as simple as possible.
Any recommendations on DVD writers with firewire, or does it not really matter.
Many thanks once again for your full comprehensive reply, it is much appreciated.
Best regards
Kev