To expand.
You would make the og entries in UBB CP
Display-general-tab html includes
In Header Insert For All Pages

For a guide on what tags to insert see:

Also after posting the first time to facebook I have found if I make any edits to the meta tags. They are not immediate nor back dated.
So all existing posts do not seem to update at first and new ones take a while to change. Probably due to some caching issue with facebook.