Complex sentence: Neil Jordan's film "Breakfast on Pluto" with Cillian Murphy and Liam Neeson was filmed in Callan during August-September of 2005, filming took during an approx 2 weeks period in which the main streets of the town were transformed for use in the film.
Split into simpler sentences: Neil Jordan's film "Breakfast on Pluto" with Cillian Murphy and Liam Neeson was filmed in Callan during August-September of 2005. During the two weeks of filming in Callan, the main streets of the town were transformed for use in the film.