I used to guess years and years and years ago when I was young. But gave up. It was like doing supernatural code breaking which you never break. It just seemed so pointless. I could not beleive that God was pleased by such pointless goings on. Better to say a rosary, or take the dogs for a walk or just about anything.
Bump Looks like this is related to the supposed testament from the Guatemalan Nun. Both are bunk, apparently. Edit - whoops, Colombian Nun.