Celtx Tutorials
The Celtx Wiki is located at http://wiki.celtx.com
http://www.ehow.com/video_4442027_title-page-typesetting-celtx-screenplay.html is a short video tutorial on how to create a title page in Celtx script editing software.
http://www.ehow.com/video_4442031_learn-av-script-editor-celtx.html is a video tutorial on how to use the A/V script format using Celtx.
There are a total of 31 video tutorials about Celtx at http://www.ehow.com/videos-on_5596_celtx-screenwriting-software-tutorials.html. (There are ads with these tutorials.)