The primary reason I wanted to do this is because the linked medium option in Peafowl links to the viewer URL, and in general, randomizing it would add some ambiguity to my single user site. No big deal though as I don't plan on using the social features, etc, publicly. My main purpose is for posting images online/email (image links) and on forums (linked medium). To do this, I edited Peafowel's image.php under linked medium + image embed so that it links to the full image. If anyone else wants to do this just go to line 479 and change "url_viewer" to "url". Pretty sweet!