Resize photos and in my Admin System

I have a website and need coding to be redone...... First -? The Banners in the Administration System needs to be automatically resized and will need to be centered? to fit in the window in the Banner Section on the HOME PAGE.....When I upload a new photo it will need to fit in the window and rotate in order received in the three windows....... Second - The same will be needed for the products section.? The Products will automatically be resized and will need to be centered? to fit in the window in the? Product Section on the HOME PAGE. Third - When somebody wants to purchase information on the website. They are directed to PAYPAL..the problem is the window to pay is small and you cant see the full payment window, this will need to be full size... [login to view URL]