In the old version I don't use gallery.xml. I use gallery.php or a other name.php. This php read my database and make a xml with php DOM. In the new version is it not possible, I can't find it, to use a php. I see in the index.html no gallery.xml that I can change. And it's not possible to place a backgroundpicture. You can make the background transparent and place a picture in the frame where you use SV.