Finally getting back to this.
I have looked for a way to export bookmarks to an html file that will retain the folder structure but have not been able to find anything.
Instead, I have simply exported the bookmarks to a flat html file, but renamed the folders so that the structure is maintained based on the folder names (which then appear as headers before the bookmarks).
Take a look and see what you think.
http://www.dukerdog.com/USATF/...tin_Board/index.html
Once you go to the page, from the Firefox menu you can select File>Save Page As... and save the file to your computer. Then you can import the file to the bookmarks of your web browser. Then you'll have the folder structure within your web browser. Or you can just bookmark the page itself and use the flat version.
Not sure what the process is to save a web page with other browsers but it's probably similar.
This is just a start. I haven't done a bookmark index for all the topics on the forum, but I'm working on it. I'll provide updates periodically.