I love the capability of rotating the pictures on my Mac Pro. in the Desktop & screen Saver catagory.I utilize 3 screens and can save pictures & move them to a picture folder where I can display them on the screens. I would like to be able to have the option of different times to choose from. Currently the choices are 5 seconds, then 1 minute, then 5 minutes, then 15 minutes then 1 hour then 1 day. I would like to change the screen to every 10 seonds or even 20 or 30 seconds. Is this even possible?