It's highly doubtful we will release DBSEO for vB5. By default, vB5 is vastly superior to vB4 in terms of SEO, not only by their URL structure but also HTML structure (which DBSEO is unable to help with). There is simply no reason to have a vB5 version, bar URL structure compatibility. This can be solved with redirects anyway1. Does DBSEO plan to be VB5 compatible?

The Pro version allows you to import vBSEO's URL configuration (which I assume is what you're referring to). It also allows you to manually customise the URL configuration beyond the normal options.2. Can my forum configuration be imported"
a. URL word separator: -
b. Max words in URL: 3
b. Thread pagination: [forum_title]/[thread_title]-t[thread_id].html (custom)
I don't believe this specific configuration is available.3. Control over meta description for threads: use x number of the first words in the first post.