If you went with the flash gallery, the right-click protection is built in. I have never been a fan of flash galleries.
Realistically your easiest defense is to only put small-size images on the web.
Disabling right click is a waste of time. If you can see it in your browser, it will be available in the browser cache. As ManiacJoe says use small size images or watermark them. The safest way of course is not to put them on a website in the first place.
Thanks for your responses.Hard to believe that Adobe wouldn't have considered this problem. Of course I do export low res versions with Watermarks. Seems to me that a feature request is in order.
You seem to be under the impression that Adobe could do something about this.