Peace When you have privately selected your Special Intention, and later you would like to make a change with out making a new pledge, just privately talk to God and change it as many times as you want to.  It is a comforting thought to know that a perfect example of the power of prayer is:  When the other rosary participants pray for yours, theirs, and everyone's intentions as they pray their rosary. 
 People uniting together in prayer, talking to God and asking for His help.
             WOW !