I've thought of it today: is it possible that no one ever mentioned Celtx in Cinelerra mailing list?
So I've decided to search - only to find no reference to this great tool! Here it is: http://celtx.com Is a complete pre-production tool. It allows you to scheadule every detail of your production, to have a list of all the people (actors, tecnicians, animals, etc) involved, and write your screenplay and format it according to rules from various working places. It's OpenSource, so go check it out! Leandro