[Theme: Realhomes] Header picture

Hey,

I am working on a real estate website and struggling with header picture. Theme doesn’t allow me to add picture to header, only solid color.
picture of website im working on: http://www.oldevara.ee

Idea is to move picture up, so that logo and menu would appear on picture. Or basically cut the picture in half and put one half to the header and other would still stay on slider so that the picture would still look like one piece.

Does anyone have ideas how to execute it?