I see in the file description for the sh404SEF extension that it "requires: Joomla 1.5.x, PHP5, BookLibrary 1.5.x, sh404SEF 1.0.7" ... but then down below it says that sh404SEF 1.0.7 is for Joomla 1.0.x, but I don't run that, I run Joomla 1.5.x, so I have no earthly idea what's going on with that, how it applies to me, nor even how to find that extension, since, when I went to the JED and searched for "sh404SEF 1.0.7" it showed me a lot of extensions but none of them were called "sh404SEF 1.0.7".
So, since I don't run extensions for Joomla 1.0.x on my Joomla 1.5.x, how does this apply? What do I really need to get those nicer URLs instead of all that ?= gobbledegook? Do I just need your sh404SEF plugin or do I need to have something else installed? And why would I need something else installed when Joomla handles "SEO friendly" URLs internally?
Those instructions need to be WAYYYYYYYYYYY more clear, because I can't figure out the first thing about what is being said, I just know that on a site that has "SEO friendly" URLs enabled and .htaccess mod-rewrite enabled, I still have ugly URLs inside the Booklibrary's pages, and your instructions for how to fix that are completely unclear.