Ok so i was attempting to change the icon of my system pref. the way I have in past OS. This was the first time I had attempted to do it in Snow Lep. Well my method is make a copy duplicate of the system pref application change the icon delete the original remove the word copy from the new one and viola it works perfect. However this time it did not work and now my system pref application will not open at all it says "it is damaged or incomplete" How do i fix this? Without reformatting?