The root folder is standard, $OEM$, AMD64, and I386.. Yeah, I grabbed the runtime before I posted and it fixed the issue.. Something must've changed with the tweaks I used to cause it not to load from the /Program Files/Firefox Community Edition/ folder, I noticed the dll is there right alongside the app. With a fresh install of XP x64 and a fresh download of it, it will load without any prompts, so i presume it's loading from the same folder as the exe in that case, is there a setting in nLite that would affect this behavior?