Isn't there a way to disable the right click? that eliminates most of the thievery. If a webpage does that, I realise i probably shouldn't take the pics. Plus, most surfers don't know how to download them any other way, unless they're on a mac or something. Are you also concerned about search engines? Cause i know you can block the google imagebot with the robots.txt page.
http://www.darren-c.co.uk/?wscripts Hey check that ^ out and see if it works for you, there's a no right click script there.
Here is a link to the right click srcipt that I use on my web page. Its small, simple and effective. Let me know if it helps. [url]http://www.edmonds-tech.com/no_right_click.html[/url] - David