The memorable info has a load of pitfalls when you get around to entering it.
When I tried to do it the only question it wanted an answer to was "Place of Birth" and the answer had to have at least 8 letters and no space. Great, if like me, you were born in Glasgow (7 letters). The other gotcha is that it will happily take a 7 letter answer without complaining at you but if you subsequently call JPAC you'll find that the memorable info doesn't appear on their screen because it isn't valid.