Cart questions

Hi there.
I have two questions on the cart. First, is there a way to add pictures to the csv import of products? Second, when you click on a product image, it display the enlarged image. You can then return to the product by reloading the page, but there doesn't seem to be any button or instruction to do so. Customers probably wouldn't have a clue what to do.

Any replies will be appreciated.
Anton.