Jimmy-
Perhaps it would be best to add them slowly, perhaps in an automated fashion,
Tricky, as we already have articles on most subjects. In these cases, there should always be an individual decision by a human on whether
- the existing text should be kept and no further action should be taken - the public domain text should be put somewhere (preferably on the talk page) - the stub should be replaced with the public domain text - the public domain text should be integrated into the existing article.
Regards, Erik