have u ever think about pre-production steps, how you manage those steps , with hunderds of papers and drawings ? if so , try
Celtx ,free and fully functional pre-production manager include storyboards , screen scripts and more. it's purpose is to help animators and movie makers for pre-production , but it can be used as well as in game pre-production , especially advanture one.
visit homepage at :
http://www.celtx.com/ Regards!