Are you asking if you could change simply the task bar on your regular Vista theme? Because I think all you would have to do is make a copy of the one you're using in Skin Studio 6, and then change the task bar. (I have XP, so I don't know if you can copy the Aero that comes with Vista, but if not, then just download one of the Aero themes from here, and change the task bar). Island Dog wrote a fantastic tutorial on skinning the task bar, so I think you would just copy the Vista area you already have change the task bar.