Dave: Again, all your points make absolute sense.
Potentially, the cost of asking for a one-off proof will be more than getting the 100 copies made so I guess my best approach is to minimise the risk by keeping all your points in mind.
Dave, many thanks!
Eric:
What is DVDA Pro?
It's DVD Architect Pro:
http://www.sonycreativesoftware.com/download/trials/dvdarchitectpro
The copy protection button needs to be check ON
The option is a drop-down in DVDA. Disc copyrighted (Yes/No) then Copy generations (None/One/Unlimited)
Regards
Dave