Old-fashioned in both its liberal humanism and its commitment to classic Hollywood storytelling, Emilio Estevez's fictional account of what happened in LA's Ambassador Hotel the day Bobby Kennedy was shot is also a fine example of old-fashioned studio craft. Deftly juggling over a dozen characters, ranging from hotel personnel and guests to Democratic Party volunteers, Estevez offers a sharp cross section of the issues and attitudes surrounding Kennedy's presidential campaign. Without privileging any member of the talented cast, he gives many of them chances to shine, especially Sharon Stone, Freddy Rodriguez, Laurence Fishburne, and Martin Sheen. I can't buy the film's premise that RFK was this country's last chance to save itself, but I'm stirred by the passion and thoughtfulness with which Estevez builds on it. With William H. Macy, Anthony Hopkins, Helen Hunt, Demi Moore, Estevez, Lindsay Lohan, and Christian Slater. R, 120 min. Reviewed this week in Section 1. a Century 12 and CineArts 6, Crown Village 18, Ford City, Gardens 7-13, Lake, Webster Place.