How I can map image gallery inside Orchard

I am working on a web template that contain an images gallery. And when you click on an image it will open a larger image inside a slide show. this is how the image gallery looks like link

Now I want to map this image gallery using Orchard CMS. So end-users can chose to add a picture and its slide show picture (mainly two pictures ; small one and high resolution one)? So can anyone advice how I can accomplish this inside Orchard cms ?