I have a feeling that IVM just acts as its own form a webserver which just generates the webpage HTML code along with the images on the fly and serves it back to the browser (i.e. I'm thinking the data for the images might actually be stored as part of the executable, not as standalone files). I think (not sure) that there is a .css file in the Application Data or NCH Software folder which you might be able to use to customize the page design a bit.