Firstly, if you want to know how its done just display the source and play. I just write it in wordpad - no special app required. You would need to copy all the thumbnail images and put them in the same directory as I have used relative pathnames for them.
I was thinking about (perhaps !) doing a little Perl script which could scrape a section off of a fixed post and build the page automatically so that any admin could then edit the post and it would update the page. I'm not sure if I would have the time to try that but it sounds doable. I have done something similar in a previous incarnation so that a wiki page had a text based data on stuff and the CGI Perl draw a map based on the stuff so wiki edits made the map. If this site could support custom perl CGI scripts then that would be fine or else I'll host it like the current one.