With just two days left before the world will be treated to the pomp and pageantry of the ancient ritual of horse-drawn carriages, glass couches and muffled guns on the royal wedding, here are few of the "surprises" and royal practices we will surely witness on the ceremony.THE LONG WALKDiana on the steps of St. Paul's Cathedral in 1981 oh her way to the aisle for a long walk. Her 25 foot long
