i would like to have the query changed for header slideshow?

Hey!My site is http://www.leahlichtwitz.com. As you can see I don´t use it as a blog but a "normal" website to present my work. Now I want to change the header image to the minimal slideshow option for the big image to disappear as soon as I open one of the 3 pages below. Usually the query for the slideshow takes the featured images of the last 5 posts. But I have no posts. Therefore I´d like the slideshow to take the images from my pages. Can you change the query for this?
Please note that I´m no native speaker and no native wp- speaker, try to explain to a dummy, ok? :wink: Thank you!