Thank you Steve.
I used a Mac app - SiteSucker last night. It worked and created a usable local backup. But the archive is 1.2GB. It looks like there are a lot of redundant files Login pages that I could toss.
I wonder if the httrack process method would create an archive that would be better? I used sitesucker because I already owned it and it was convenient.
The goal was to create an online searchable archive without having to update the update the phpbb software and something that may be easily more portable. I’m not entirely sure whether this is a doable and successful task.
If anyone knows of an online example archive that does something like this that would be great. I haven’t found any so that leads me to think that it may not be a realistic task.