fashionsnap_enlarge_images.user.js

// ==UserScript==
// @name           fashionsnap enlarge images
// @namespace      http://userscripts.org/users/25793
// @include        http://www.fashionsnap.com/streetsnap/*
// ==/UserScript==

Array.forEach(document.images, function(i) {
    var pa = i.parentNode
    if (pa.rel && pa.rel.match(/^lightbox/)) {
        i.src = pa.href
        i.style.width = 'auto'
        i.style.height = 'auto'
    }
})