What images scroll? you mean the slider images
I already replied you in the message, you can have a header image using the slider, and again, all you have to do is disable all additional slider settings like auto play, loop, color effects and so on... after that enable the slider 1 and upload the slider image. this way, the slider shows only one image and no title no contents, thats like a header image.
This website http://www.dumontduneriders.com/ uses magnum theme and the slider as a header image. you can do something like this in your theme ?
otherwise there is no specific header image setting. i know it used be in magnum theme like more than two years a go. but it has been deprecated long time a go for whatever the reason was ?