My own experience with spotlights is that Poser doesn't handle them well. The little lighting palette is great for setting up global-type lights, but it only changes the direction of lights, and for spots you need to move the actual light source. So remember that you have more than one camera. Set up a second camera with a wide view angle from a considerable distance, so you can see where the spotlights are, and use those views to adjust their position. One of my weaknesses is that I still struggle to connect some of the numbers on the parameter dials with the scene. I find I need to see the lights.