Say for instance my structure is as follows:
Main/Forum 1/Forum 2/Forum 3.

How do I set up phpBB SEO so that my page title (shown in Google results) is:
Forum 1 - Forum 2 - Forum 3 - Site Title OR even better, allow me to select which levels of forums are shown

Rather than just:
Forum 3 - Site title

Reason being is that "Forum 3 - Site title" alone does not mean much, but inclusion of Forum 1 and/or Forum 2 in the title will assist.

This is just my opinion, but when URL's are >100 characters they're not very efficient. You can do what you want by activating sql rewriting of topic titles, but you'd have to manually select the URL for each topic.

It's not the topic I am concerned about, it's the actual forum names not appearing in the title.

Bump, still looking for a solution.

Bump, still looking for a solution.