[Plugin: NextGEN Gallery] NEED HELP – Use NextGen to sell photos with variations

Hello, I can’t seem to find a complete solution for what I need…can anyone help?

Here’s what I need…my client needs to sell photographs online (not digital, but actual prints). My client wants the thumbnails to enlarge into bigger versions of the photos…and he wants the ADD TO CART button on the enlarged version of the photo. Since he will be selling different sizes, a variation with a drop down menu for sizes and differing prices is also needed. I guess the variations would not HAVE to show on the large photo, but could show up as an option once they clicked the ADD TO CART button…whatever is easiest.

I’ve used the WP E-commerce plugin by Instinct before, but can’t figure out if it’s even needed in this instance, unless it’s needed simply for the variations…plus, he prefers to use Google Checkout as well, which I know Instinct supports. Can anyone suggest the best solution for this? I am trying to provide a quote to my client and I’m lost on this piece of the puzzle. I’m also willing to pay for custom work if needed.

Thanks for any suggestions!