We autorewrite normal VB
If your making references to images using relative urls of course they will not show and hense we state to make them full url's. I don't get how you think thats unacceptable as its normal practice when trying to show images from outside a directory structure that they exist under.
We code to the default vb3 install and there is no way for us to consider or support the thousands of customer variations in html hense it is the customers responsibility
Now I see no missing images in your install when I look at it and also please note you are integrating with a beta product we do not support at this time. If you give me something to work with here maybe I can make a suggestion but since I see no missing images or a specific issue but since your talking about some sort of popup you must be dealing with somebody else's code as nothing we do has popups.
Now I will not post your url here since you did not but I see no missing images.