Gallery site

I require a simple gallery site. each image is to have a description and an email link that tells me what image the visitor is enquiring about. I do NOT require a shopping cart or e-commerce site, or page design..simply the php script to make this work. Gallery needs to be easily integrated into an existing web, and useable in multiple instances within the one web. It also needs to have a simple interface at the back end for adding new images and descriptions. Something similar can be viewed here: http://yarliyilarts.com.