Hi GiveMeAHammer, welcome to the PC Mech forums!
There are different ways you can protect images on the net. One is to disable the Right Click feature (using a JavaScript) so that no one can save the file to their drive. Another is to add a light watermark to the image, so even if they can copy it, it will always have your name or your web address on it. I've also seen other methods of image protection, but I don't remember how they work for sure. Check out these links for more info:
http://www.artistscope.net/
http://directory.google.com/Top/Comp...nd_Protection/
Hope that helps.