Renaming Files

I was curious, if there was a way I could highlight a set of images and relabel them in order without having to do it manual. For example in the picture below, there is 6 images with different names, could I highlight and name them 1-6 for example. Thanks for any help you can provide.

Edit, can someone move this to the mountain lion community for me.

Message was edited by: Shaun.M