In a large bowl, beat butter, cream cheese and salt until smooth. Gradually beat in flour. Divide dough in half; shape each into a disk. Wrap and refrigerate 2 hours or until firm enough to roll. , Preheat oven to 350°. Dust a work surface with about 2 tablespoons confectioners' sugar. Roll 1 portion of dough into an 18x8-in. rectangle; cut dough crosswise into six 3-in.-wide sections. Cut each section crosswise into eight 1-in.-wide strips. Roll each strip around a pecan half; place 1 in. apart on ungreased baking sheets. Repeat with remaining dough and pecans, dusting work surface with an additional 2 tablespoons confectioners' sugar., Bake 12-15 minutes or until bottoms are lightly browned. Remove to wire racks to cool completely., Place remaining confectioners' sugar in a shallow bowl. Roll cookies in sugar, coating well.