I think it would be cool to have little name plaque/plate under each frame, so the titles can be seen as you are walking around. This would be an optional setting, of course.
Another idea would be to have some method of displaying the subject of the pictures in each room. Perhaps a small sign hanging down from the ceiling just before you go through a doorway - similar to the "Exit" signs in buildings. Or a plaque to the right of the door frame, like this picture:
http://www.myengravedsign.com/MES/image ... r_sign.gif