The Kosciuszko Foundation New England Chapter is sponsoring the 7th annual Polish Film Festival at Elms College in Chicopee, Mass., in October.   Highlighting the festival will be the first area showing of Andrzej Wajda's Oscar-nominated film Katyn (2007), a story based on the Soviet execution of thousands of Polish army officers and other prisoners of war in 1940, and the impact on some of their families. (See http://www.katyn.netino.pl/en/)   The festival is free and open to the public. All screenings are Wednesdays at 7 p.m. in the Alumnae Library Theater. All films are in Polish with English subtitles. Jan Paluchowski and Elzbieta Swiercz will offer commentary.   Here's the lineup, with film details available at these URLs:   Oct. 1 -- Stara Basn (An Ancient Tale) http://www.imdb.com/title/tt0380726/   Oct. 8 -- Tredowata (The Leper) http://www.imdb.com/title/tt0075348/   Oct. 15 -- Panny z Wilka (Young Girls of Wilko) -- a 1979 Wajda Oscar nominee http://www.imdb.com/title/tt0079696/   Oct. 22 -- Pora Umierac (Time to Die) http://www.imdb.com/title/tt0835834/   Oct. 29 -- Katyn http://www.imdb.com/title/tt0879843/   -- Barbara Proko Massachusetts native