If you want to protect your images don't upload em.
Seriously, you could watermark them. Add something to the image that effectivly spoils it for any other use, maybe your initials.
No right click scripts are fine but save as pulls the pictures to the hard drive anyway. If watermarking is not your thing then consider having images show in a popup with no tool bar etc and have a no right click script in place within that window. Should make it harder for the images that are not watermarked to be copied.