If you have any problem playing the files on this CD, you should download and install the VLC Player, a free software application that will reproduce almost any kind of multimedia file: http://www.videolan.org

If you prefer using iTunes, download and install the proper codecs from this website: http://www.xiph.org/quicktime/download.html

(the file you need is the "Xiph QuickTime Components binary package" for your system)