Auken, Borowski, and Sierkowski,
Thank you for your advice and technical concerns. Obviously, this is all stuff I've never even thought about before and i appreciate the fact that you're trying to pass on your knowledge of the subject onto a humble student like myself.
However, because of these concerns and those of our production company's to afford the post-processing of pulling the film, as well as the fact that we can't afford to get a different stock in enough time or paint the sound stage a different color, we have opted to shoot all the green screen shots on digital with the Canon 7D. Though I have my own concerns about this line of cameras, we just don't don't want to risk the amount of grain and problems we might see once we get the dailies back. We have a very limited budget, as well as man power and technical prowess in the post department and we don't want to risk a faulty final product.
Thanks again for all your help. I'll be sure to let you know how the shoot goes.
Lowell