SNIPOscar-winning doc filmmaker Barbara Kopple ("Harlan County USA," "American Dream") teamed up with collaborator Cecilia Peck to co-direct a behind the scenes look at the best-selling female group of all time, "The Dixie Chicks." The film, "Dixie Chicks: Shut Up and Sing" was initially envisioned as a much more modest project, according to the band's Natalie Maines who spoke at a press conference this week at the Toronto International Film Festival. "We originally thought of having a filmmaker [to capture footage] for ourselves or as a supplement to some concert DVD release," said Maines. But Maines' now famous off-handed comment...