sa-learn update global db

[Lightology Postmaster]

I ran sa-learn as root and it created /root/.spamassassin/bayes_seen, bayes_toks and user_prefs file in this folder. How do I make the global spammassassin use this new learned spam because I don't believe is reading this files now. Or better put how do I train directly the global spammassasin and not just for individual users?   second, how do I tell from the header of a scanned email if it used the bayes filter or better if it user the new learned spam?   Chris V.