I just discovered this program called PureRef and thought many here might find it very useful. It displays your reference images you using to paint. It runs on top of what ever software you are using wether it's ArtRage, Photoshop or what ever. You can display multiple images, move them, zoom and many other features. You can save groups of images and organize them. There is more to it than I can explain here. Below is a link to a short video showing it used with Photoshop. And an link to the website. Mac and Windows versions available. It is a "choose your own price" software. I bought it and it works great with ArtRage. I know AR has reference images. This could be an additional tool and one you could use with any program. Kind of like AR's references on steroids.
http://www.ctrlpaint.com/videos/a-be...ference-images
http://www.pureref.com