If he's so ashamed...

there are a lot of things Fr. Ratzinger could do to make it right beyond rhetoric:

Pope Benedict XVI has said he is "deeply ashamed" of sexual abuse by clergy in the US Catholic Church. The Pope vowed to work to prevent paedophiles from becoming priests as he flew to Washington at the beginning of his first visit to the US as pontiff.

For openers, he could make Bernard Cardninal Law return to Boston and fully explain why he covered up the widespread sexual abuse scandal in that city. Fr. Ratzinger could also come clean and fully disclose his personal role in any cover-ups in the last twenty years.