Python Script: Create a polygon (rectangle) using a single point feature

I've got 563 photos that have been taken as part of a survey. I've also got a GPS location for each Photograph that has been taken.
Jake Skinner from ESRI provided me with a starting point: http://forums.arcgis.com/threads/973...989#post346989

What I would like to do is rather specify the width and height, instead of using the current data frame extent. So I'm looking for a way to generate a polygon around each point feature that represents the location of the photographs, based on a specified height and width.

Regards