[Plugin: External DB authentication] How does this work?

I have submitted the external database information, and it showed success. I’m trying to use the members from my SMF forum. It provides the backbone to my site, and I’m switching over to WP for my site. I still want to keep it as the forum and maintain all my member registrations (over 3,000), as I use SMF’s membergroups and Paypal to control subscriptions and user access.

I can easily utilize the code to control access, as well as cross over SMF registration onto a WP page, but I’d like to have integrated use of member information. In other words, have WP recoganize SMF users.

Now what?