There are 2 previous versions of this script.
// ==UserScript==
// @name FPSBanana Auto-sort by rating descending
// @namespace http://userscripts.org/users/23652
// @description Auto sorts listings by descending rating
// @include http://www.fpsbanana.com/*
// @copyright JoeSimmons
// @version 1.0.1
// @license Creative Commons Attribution-Noncommercial 3.0 United States License
// ==/UserScript==
var re=/[&?]mn=[^&]+&order=[^&]+&sort=[^&]+/,
hasQ=/fpsbanana\.com\/(\w+\/)+\w+\?\w+=[\w ]+/,
url=window.location.href;
if(!re.test(url) && document.evaluate("//div[@class and contains(.,'Sort by:')]", document, null, 9, null).singleNodeValue) window.location.href = url.replace(re,"") + ((hasQ.test(url)?"&":"?")+"mn=1_body&order=rating&sort=desc");