To coincide with the release of Robert Altman ‘s “A Prairie Home Companion,” the Museum of the Moving Image

is hosting a six-week retrospective of films by the 81-year-old maverick.This weekend ‘s fare includes “M*A*S*H ” ((1970), with Donald Sutherland (left)and Elliott Gould.Altman will be at the Astoria,Queens,museum for tomorrow ‘s 2 p.m. unspooling of “Kansas City ” ((1997).Details:movingimage.us