I just finished my video-tutorial about creating an animated asteroid belt.
Topics covered are particle-dynamics and animation, object-instancing through particles and groups, quick model-generation with the Asteroid Belt script and Sci-Fi space-lighting.
Basic knowledge of Blender is highly recommended as I don’t litereally describe every button-press. This video-tutorial is more focused on the general concepts behind the creation of the scene.
The .blend-file and the used script can be downloaded from my blog at konrad-haenel.de/tutorials/asteroid-belt-tutorial