From what I can tell, this guy is at the top of his class with what he is doing... or so it would seem. Seems as though this is an internal 'refresh' in this url string - cturl - that's what I understand from light research. The whole string smacks of CS... but seems to have some words to lead a viewer to think it some form of tracking - not bad. Any layman explanation of what all is going on here? Thanks in advance... and maybe you can employ this yourself... although, putting a php file directly into an image tag seems sloopy, non? I can see all of the %2's convert to a slash and all the regular jargon for http:// formating... and the 1x1px trick. Code: <img src="/imp.php?cturl=http%3A%2F%2Fwww.domainname.com%2Findex.php&cmd=PixelImpression&pixel_ref=http%3A%2F%2Fwww.domainname.com%2Fcategory%2Fweb-hosting%2Findex.php" width="1" height="1" border="0" alt="" /> My take is that it is pounding a referrer and a "round edible disc with chocolate chips" into the heart of the browser. (and it does, just trying to understand the mechanics) I suspect .htaccess is in full use here to force the img tag to php etc. This guy has an entire realm of sites pumping each other - the perfect example of how to dominate - close to 50 backlinks with mostly the same IP/owner.