If you highlight all the pics in windows and do a rightclick -> Rename and change the file name to wedding or something it will simply call them all wedding and then add (1), (2), (3) to each of the pics after the first.
If you are going to use lightroom to order them by time then this could be the best way for you.
If you are going to use lightroom to order them by time then this could be the best way for you.