however, least! u can disable MSIE 'pop-up' for image->save as
<meta http-equiv="imagetoolbar" content="no">

( u may create members area, let them login or pay for ur images )
sometimes, i've seen i can't save a web page ( though images can be saved )
X "This Web page colud not be saved"
HTTP is a stateless protocol, i think, this is a error in local pc.