We had a model in the studio today so I took a photo of her listening to the sound of a shell, and then combined the photo in Photoshop with one of the sunset imagesI took in Jamaica.  We positioned a strong tungsten light behind the model to create a flare that would mimic the light from the sun.  Selecting a daylight color balance for the RAW image also allowed the warm color of the tungsten light to permeate the scene and blend better with the background.  The background was kept intentionally light to allow a designer to use the space for copy placement.