Since the template that is created is based on CSS settings you should be using css yourself to get the images displaying properly. When you mix tables with css based layouts things can end up not looking the same in the various browsers and you will not have as much flexibility to customize the design.
You should use some divs and apply some css to the divs to have them display the images in these locations. You can use the default template as a guide to how you have the divs setup to display the images properly. If you have any trouble with this just let us know and we will be glad to help you out.