How often do you forsee this occuring? IF its a one time deal, you copy from the good database, right click in the one you want to update and then paste it--choosing to overwrite the existing table in that database.
If its going to occur regularly, then I would think about not doing it, but instead having that table be a linked table. That way its always looking at the good data source and you don't have to touch a thing.
Why can't you use a linked table for this?