Put menu, logo and phone number behind gallery viewer

Hey guys, I've just switched over to the Wordpress NextGen Gallery and I can't work out how to get the menu bar and my sites logo and phone number section to fade to black, behind the gallery viewer. Has anyone got any ideas on how to do this?

Thank-you

 

Hello,

Paste this code in Custom CSS
Appearance > Theme Option > Styling Option > Custom CSS

Code:

#fancybox-overlay {
z-index:99999!important;
}
#fancybox-wrap {
z-index: 100000!important;
}

Thanks & Regards
Nitesh Raghuwanshi