Using a lot of experience, guesswork & insight, managed to get as far as previewing the converted slideshow, which was an Open Office Impress one, and it played right through within DVDslideshowGUI. Then, I clicked on Burn to Disc, and in comes IMGBurn with six options, something like:
What would you like to do?
Write Image files to disc
Write files and folders to disc
Create image files from disc
Create image files from files/folders
Verify Disc
Discovery
I presume the first option is the one I want, but can get no obvious result on disc.
Where am I going wrong? Thank you.