NEW YORK CITY.- In the galleries, the show at first seems alternately dominated by room-size installations and video projections. Among the eye-catching sculptural works are a sprawling, graffiti-inspired installation by the late San Francisco street artist Margaret Kilgallen, transplanted from a show at the Philadelphia ICA; Chris Johansen's stairwell installation of colored, spindly lumber and comic wall drawings; Robert Lazzarini's uncanny model of a pay telephone booth rendered 3-D at a sharp oblique angle; and Christian Marclay's Band, a dramatically color-spotlighted sculpture of metaphorically stretched and bent rock instruments that was shown last year at Paula Cooper Gallery. The installation of models, photographs and a documentary videotape by the Rural Studio, the architectural practice established by the late Samuel Mockbee in Hale County, Alabama, is especially notable.