NO HDR Light Probe pluged into poser light is moving only if you move the scene using the camera, you can't change the direction of HDR IBL by moving the light .. the rest of the lights you use can fly around as you wish, you can use one HDR IBL but that is only the light that come from the sky and the elements around the model, this is the light that are reflected on earth from everything around you, for a great effect as shadows, specular or a direct sun light you need to use only one more light , you can set down the diffuse to black if you want only the specular effect .
you dont need more that 2 lights to make it looks real..  HDR IBL bright up very much the model surfaces, setting the Diffuse color to R: 127 G: 127 B: 127 will change the surface and it will looks more natural.. don't worry it will not make the textures looks darker.. if you have good and real HDR light probe , the Intensity is fine on 1,0 so the contrast on 1,0 should works perfect..

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