I tried that, but aparently that only controls the popup window that comes up when you click on the image. In the script notes the author created the script so that you didn't have to input each image size. That wouldn't have been a problem for me, but it would be a nightmare at this late date because I'd have to pull all the images into PS and get the dimensions again.

It's weird though because the script resizes 'some' images up or down, but not others.