Paste this in every gallery description box AND every image caption box and the Right Click feature is actived.
<body oncontextmenu="alert('Photos and other marketing materials at this website are protected by copyright law. Please contact us regarding the use of these images.'); return false;">
The Text in the parenthesis can be changed accordingly.
Yes I know there are ways of retreiving the files from the Temporary Internet Files folder and that there are websites that break down every file on a webpage so they can be downloaded. But if this distracts 1 person from taking an image then it is worth the trouble of putting in/on every gallery and picture.
Enjoy