Thanks Chris,
Bullet well and truly bitten - easy and quick at last. Slight hiccup when my copying put all the discs in one folder as intended, which gave me a copy of DVD1, and a separate merged copy of the other 4 discs (all same name). After the 'Run' of DVD1 it of course asked for DVD2 to be inserted - answer was to put the merged copy into the copy of DVD1, and all was then well. Of course you know this, but it might help others.
Cruachan's reference in this forum to the FlightStore forum info is exactly what we all should have had in the package, methinks.
Happy now ...
Dave