[eluser]JamesL[/eluser]
After a short break I took g's advice and modified the image.php file so that the script now does exactly what I want it to. I hard coded the smaller thumbnail parameters into the script, although a more elegant solution would be to add to the parameters the script accepts to allow for this kind of image handling. I'm not sure how common this kind of request is, but I would be happy to post my code if anyone needs it.