Setting Your Default Theme in PowerPoint

This didn't work in Powerpoint 2007/2010, but it can be used to find the correct path to the necessary files.

http://blogs.msdn.com/b/powerpoint/archive/2006/10/31/quick-try-this-setting-your-default-theme-in-powerpoint.aspx

Create a torn paper effect in PowerPoint

This video shows how to do this. It involves using the  free-form shape from the Drawing section of Home, changing the colour and cropping the image.

http://screenr.com/oIh