Hi,
You need to edit the theme files for this, if you want it go to wp-content\themes\neighborhood\includes\swift-framework\sf-content-display\sf-header.php and start from #336 you will see a bulk of codes navigate to the code according to the header you choose, stop at the header type, for example if you choose header 1
if ($header_layout == "header-1") {
then stop here, and see the </header> end tag, and after that start a div like this to put you images.
$header_output .= '</header>'. "\n";
$header_output .= '<div> <img src='http://example.com/hi.jpg'></div>';
PS: Caution with the code edits, back up the file before start editing, if anything goes wrong, revert it back.
Let us know,
Thanks,
laranz.