Not to direct this at any particular organization, but it seems to me that if you want to start repairing your credibility after giving shelter to child rapists for decades, it is pretty clear how you should start. First, admit that you have entirely failed to prevent criminal abuse through your internal processes. Second, openly encourage civil authorities around the world to prosecute your members and affiliates just as they would any other criminals. Third, make all your internal records available to assist them in securing arrests and convictions. Fourth, encourage the prosecutions of those involved in covering up known crimes, as well as those who actually committed them.
Anything less than that and you can be rightly accused of just perpetuating the aiding and abetting of vile crimes, and continuing to utterly fail to act as an ethical or responsible organization.
As for those looking into the matter from outside, it is time to stop allowing organizations to hide behind pathetic euphemisms and false contrition.
[Update: 12 Apr 2010] Things are heating up, rhetorically at least: Richard Dawkins calls for Pope to be put on trial.