1. We are looking to make it so that on the single product page, when you mouseover a thumbnail image, it appears on the main image link. For instance, see amazon's product pages. When you mouseover a thumbnail image of a product, it replaces the main image of the product with the thumbnail. I do not mean that when you click a thumbnail, it becomes the main image. I mean when you mouseover it.
3. We'd like to be able to create a limited sale. For instance, see the attached file. Can you see how each item for sale is for a limited time? It says "Sale Expires in 2 Days" or "Sale Expires in 15 Hours". When we post a product, we want to specify how long the item is for sale for. Afterwards, we want a similar box to appear beneath the product image on our sales page that says the "Sale Expires in X".