Here’s some articles that should help you get a better understanding of "green screening" or compositing.
Compositing basics:
http://www.videomaker.com/article/10387/
Lighting a green screen:
http://www.videomaker.com/article/10914/
How we did it… here’s an example of green screening. Watch the Tips & Technique video segment.
http://www.videomaker.com/vidcast/36/
Hope that helps. As for me, I have very little experience doing green screens. Maybe someone else can give you more details on this forum.
Mark
