Further Filming and Greenscreen

I have decided I must conduct some further filming for my peace, as i do not feel i have inadequate footage at the moment. For example after one of the soldiers has died i do not have the stationary dad body on the ground while the rest of the shot takes place. I also think that if i green screen some actors it will allow me to edit my special effects in a little easier. I have contacted a friend who has his own successful company in edinburgh and who has a fully ready green screen. I now have to arrange when is best for both my actors and my friend so i can shoot some more shots.