Why not write directly to the magazine?
Bob Boudreau
CANADA
Visit my model railroad photography website: http://sites.google.com/site/railphotog/
If you look at the contact information for the Model Railroader staff on page 6 of the April 2007 issue, you'll see that his name is William Zuback and he is the Photography Supervisor.
MR can be contacted by e-mail at mrmag@mrmag.com so I'd try to get it straight from the horse's mouth.