I've got one, but it's so old it doesn't work on modern computers.
I corresponded with Stephen Ryder a little about these years ago.
I never got one myself. But IIRC he described it as a bunch of html pages with a menu to guide the user to the html pages. I think he said the menu used Flash.
I'm not certain but if you browse the contents of the disc you might see a load of .html files and they should be readable in modern browsers.