Robert,
In the live preview site you can see that the traffic camera point have the traffic image in the pop up. This is done be using a field in the layer that has a portion of the url or the full url of the image that is associated with the feature. So some fascinating steps are to create a virtual directory on your web server so that the images can be accessed by a url and then create a field in your layer that will be filled with the image url. The you configure the eSearch for that layer using the image setting portion. Specify that field and that it is an image.
