If you don't have silverlight, another place that may or may not work for you but has the Messenger lectures in a different format is: https://www.youtube.com/

If you don't have silverlight, another place that may or may not work for you but has the Messenger lectures in a different format is: https://www.youtube.com/playlist?list=PLF96D8FFDDE4B9087 https://www.youtube.com/playlist?list=PLF96D8FFDDE4B9087