I think you can watermark images with an invisble "watermark" so there's no need to overlay your name over the whole image... It's just some info inserted on the file structure, that stays there displaying the owner of the copyright, and wherever the image goes, and whatever editing the image suffers, it stays in the code and can be checked for copyright issues... can't remember any program right now. But i'm quite sure it can be done... Anyway, I think it's a commercial program, so it's use is only for people willing to protect their own artwork... But who knows, maybe there are freeware programs....? My 2 cents... (of euro!) :D