AT THE MOVIES, Emilio Estevez, Kiefer Sutherland, and Charlie Sheen saddle up in Young Guns (left). IN MUSIC, Steve Winwood’s comeback ditty “Roll With It” is Billboard’s No. 1 single, while Guns N’ Roses’ Appetite for Destruction takes the top spot in its 50th week on the album chart. IN BOOKSTORES, astrophysicist Stephen Hawking’s A Brief History of Time is the best-selling nonfiction book on the New York Times list. AND IN THE NEWS, presidential candidate George H.W. Bush cuts his list of potential running mates to six, including Bob Dole and his eventual choice, Dan Quayle.