BWIA International Airways will launch its first-ever advertising, a $15 million campaign over the next three years, on April 8. Focusing on the New York, Miami and Toronto markets, the campaign from Romann & Tannenholz will hit spot TV, radio, regional magazines and outdoor. Pope lends endorsement to religious itemsPope John Paul II is endorsing a product for the first time in a TV ad campaign to break in Italy this month and internationally soon afterward. The 45-second spot, produced by the Vatican and the Alliance Entertainment Corp., is for a package containing a set of rosary beads, two compact discs, a manual and a photograph of the pope. Saatchi & Saatchi Rome handles the Roman Catholic Church's account in Italy.