Attached Link: http://www.debevec.org/HDRShop/

Sorry, I've been dumb which is why I deleted my previous message. There's a much better way, using Environmental lighting: Add a sphere to your scene and make it large (600in in each direction). With the sphere selected choose Edit>Send to Origin. Delete all lights in your scene and set Ambient light to zero. With your Sphere selected switch to the Texture Room and add your image map to the glow channel. Zero out the color and other channels. Switch back to the Assembly Room, make sure your Sphere is still selected, then choose Edit>Environmental Lighting. In the pop-up window switch the Color to Object Glow and click OK. That's it, render with GI and Indirect lighting for best results. My example was rendered in C2. The bigger the better for the map. Mine was 1500 x 1500 pixels. It needs to be a proper latitude/longitude panorama. It's wrapped around the whole sphere (like a Mercator projection). If you get HDRShop (see link) you can convert any HDR file into a jpg or bmp that you can use in C2. Mark