White frame in nextgen gallery

I’m using next gen gallery and have site here:
kacperki.pl/klinkier-przysucha/klinkier-przysucha-elewacje/klinkier-przysucha-elewacje/

I would like when i push thumb and open a big photo have a white solid frame around big photo like this:
andbud.pl/bruk

I have also question how to do that the alt or tittle from the nextgen will searching when i search any word in wp search fields (i dont now if it’s easy to understand wiith my english :-))