I believe this may have referred to the game's ability to import individual historical players. So you could create your own teams of all-time greats. However, I don't believe OOTP has any simple functionality for doing this all at once with just a couple of clicks.
However, others have created templates or databases to enable you to do this. Try reading this thread.
http://www.ootpdevelopments.com/boar...n-updates.html