another solution to the photo problem would be to leave the window
glass alone and change out the glass in the photo frames with UV glass.
I know that custom framing shops carry this, but I'm sure you could
get it cheaper through an auto glass place.
my cousin owns a Glass Doctor franchise, which does auto glass and home
windows etc. I'm sure you could go to a similar place and have some
pieces cut for your photos.
http://www.glassdoctor.com/ you can put in your zip code to find a
glass doctor near you.