=======================================
I'm thinking there's always a way to copy images from
the net. Your best deterrent would be to emblazon a
copyright notice across the center of the image files.

I recently saw this same issue discussed in a different
newsgroup and special software had been used to
prevent right click/save as. And it worked...only problem
was...you could go to your temporary internet files and
copy the image anyway. Also...there's always the "Print
Screen" option.

Here's one example
http://tinyurl.com/38sek