To watch the ProShow video/slideshow you need to download and install the ProShow Presenter. This is a small file and takes less than a minute to download and install.
Go to: http://www.photodex.com/products/presenter/ to get the download.
After installing use the back button to return to this page and click on the show you want to view.
Note: Best viewed using Internet Explore but they will play if you use Mozilla Firefox.