Thanks for your reply. Sorry for the late response. I was concerned about whether there was a restriction when using the Lesson tool and I didn't want to manually load 98 image files, one by one, adding the content "Next" and "Back" only to find that I may have used the absolute number of content pages that you could use. But I was able to add 98 images successfully.
As it turns out, the project manager would prefer the use of the Lightbox Gallery anyway, and hopefully I can easily find the option to hide the 98 images from displaying in the topic!
I am working to create a portable Moodle and managed to get to 2.2 successfully but did read that somebody has achieved a portable version of 2.7 but have so far spent the whole morning with no success. I think it's time for a walk, a think and then try again later today.
Thanks for your help. Happy Moodling.