"Do you ask a bird how it flies? Or a fish how it swims? Nossiree, you don't."
Just kidding. The image on the easel was shot like you would any other. The sketch image had a flat “home shopping network” lighting.
For the over all sketch effect, duplicate the layer, invert, blend with color dodge. At this point the whole image should be white. Now run Gaussian blur on the top layer, radius to taste. Flatten and desaturate. Run the chalk and charcoal filter and fade it to about 20% blended with multiply (this gives it a little texture).
The photo area has four stages. One layer is the actual image, the second is a photo art layer to look like a roughly colored pencil sketch, the third is an inverted, desaturated, and blurred glowing edges effect, and the fourth is the same as the sketch with a lower opacity and all the detail painted out.
Mask the four layers over each other to make it look half done, and mask the sketch layer over it. I roughed up the edges of the drawing area a bit.