Software for photograph portfolio and e-commerce

I have a friend who is looking for software to display their photograph portfolio and to also be able to sell the pictures via an e-commerce programme.

Here's some things they would like the system to do if possible

- be able to display a photographic portfolio but for it to be difficult (impossible) to copy the image from the page displaying it

- be able to group images together and sell as a "lot"

- visitors to be able to purchase the images (framed & mounted & posted to them) or more than 1 image via a shopping cart

- cart should integrate with at least Paypal

- be easy to change the style or apply a template for the design of the site

It has to be simple to use. They don't want to purchase the service from another company but run it on their own servers so it has to be software they can download or purchase.

They are concerned about people simply copying the image so it is important they can't easily download or copy the image from their site.

Fully-blown shopping carts seem to have too many features for what they want to do and none of them seem to be geared towards image sales, whereas portfolio programmes don't have e-commerce facilities.

Does anyone have any suggestions (and links) to what software would be suitable.

Many Thanks