Donnie,

You can start by taking it easy on the slicking up of lips/face and legs, bringing information back into the highlights, and desaturating the image a bit. The light in your image is much more contrasty than the D&G images as well as coming from a different direction, therefore making it look like the D&G ads will be nearly impossible. The campaign images look like they have minimal retouching on them. It's all in the light.