You should only have to read the 1st post by simon and the link he mentions in that 1st post about asta's method of implementing extensions and themes... Just download the 1st exe he has a link for, use that as your installer, uninstall firefox if you have it installed already, "remove the mozilla firefox" , then install using this installer. Goto the Prog Files\mozilla firefox folder, launch the default profile shortcut thats in there and install your extensions and themes you want and configure your settings how you want... once thats done, simply save you 'defaults\profile' folder... and copy that and your plugins folder to your UA CD and have it copied back to its original location once the install has run on your UA install (or create an SFX that will extract to the folder instead)