NEW YORK, May 8 (UPI) -- Avengers, A Beautiful Mind and A Knight's Tale icon Paul Bettany says he approached the historic role of Antonio Salieri in the limited series, Amadeus , the same way he has his other characters -- by first considering what he wants and what he is afraid of. Premiering Friday on Starz, Joe Barton 's adaptation of Peter Shaffer's stage play casts Will Sharpe as Wolfgang Amadeus Mozart , an outrageous 25-year-old maestro who takes 18th-century Vienna by storm, much to the