Well, unfortunately is not something something someone can point to in a few seconds. I guess if you have a CG Cookie account you can start watching the fundamentals. In Blender you can bake the light and shadow information from your 3D model into textures, but again, maybe you can watch the courses on how to do that. Do you have an account here? Also, can you ask them to give you more details about their workflow? Because the Photoshop part would be a different topic though, I can’t see why you can’t just paint in Texture mode in Blender, but everyone has their own workflow.