I decided to switch from “CSS3 Lightbox” to “Simple Lightbox”. Main reason was that “CSS3 Lightbox” did not view my pictures in a large size. There is not options page where you could configure it. The good thing about it was that it was really light weighted. “Simple Lightbox” views the pictures in a higher resolution but is somewhat heavier. Guess will have to live with that.
I wish you well