I figured it would be best if I showed an example of what I am trying to do...
Here is an example of a normal product, which as you can see looks very good with our 480px wide images. We wanted to do it this way as to not need to use a thumbnail sized image and make the user click as for most of these parts a medium sized picture would suffice enough for them knowing if this is the right part, so we decided to make that the product image and save them all the extra clicks...
http://www.greatlakesvacuum.com/xcart/product.php?productid=5&cat=57&page=1
This means I want to keep that size image as the main, but can not use the detailed images in its default condition .. plus I have to make some layout changes to my left margin (basically remove it) and set my details to flow underneath the images, not just to the right of it...
Here is the first product I added to the category...you will see why I need to change it so much!!!
http://www.greatlakesvacuum.com/xcart/product.php?productid=89&cat=1&page=1