Alphabet Photography Website

I am a photographer who has taken images of things in nature, architecture, and other areas of interest, that resemble (or are) letters. I am interested in having a website built that will be able to allow customers pick the individual images and put them together to create words. I would also like them to be able to purchase the images as well as other items on the site. I currently have a basic site through Wordpress, but do not know how to get all of my individual images organized so people can see letters together before buying. I'm looking for a clean design, reflecting the look of an old photographer's light box (used to view slides, negatives, etc). Perhaps the lightbox could be where images are dragged to for viewing words. . My current website is below. I would like to make some modifications to the design, but it's what I have for the moment. This project needs to be done quickly, if possible. My current website is: [login to view URL] I would like it to function like: [login to view URL] [login to view URL] I love the idea of being able to pull letters down to form words, with a simple cart system once they choose their images.