in the ppc software forum there is a subforum devoted to titanium tweaks. I would check that out for tons of info, especially the thread about adding panels. To get weather or any other panel that isn't standard you must install it by cab then you will want to install cHome editor or titanium customizer (titanium customizer is more simple but cHome editor has a few other options) and you will be able to select which panels show and what order they are in.