Inorder to visualize an ns simulation, you need to have the NAM tool installed. You could either simply download the nam binary for your platform or download the nam distribution and build in your machine. The link for getting nam binaries as well as nam source is http://www.isi.edu/nsnam/nam which also happens to be the nam homepage.
50.2 Using NAM for educational purposes
Steps to use nam in powerpoint:
After opening powerpoint, go to ``Slide Show'' (visible on the top menu) and click on ``action buttons''. Select the type of button you prefer. This would create a button for your slide. Clicking on your button will pop up an ``Action Setting" window. Inside the window, there is a place called ``Run Program'' where you
can define your nam program to run.