Customisation of e-shop on Bigcartel.com

Hello, I am looking for some customisation of a ecommerce store that I already have in place. I am looking for the following features to be added: - Newsletter pop up - Newsletter sign up form in footer - Product Larger images on home page - Seamless product roll over on product detail page (customers have the ability to hover over an image instead of clicking to view. - Alignment of images to the left / text to right on product details pages - Polished formatted text in product descriptions