Attached Link: S c r i p t e r s W o r l d ; Free Online Conservatory For Screenwriters

You don't need to buy software to do a screenplay, but the site above may have some freeware/shareware that would be of use to you. An alternative is to go to your nearest library and you will find books on formatting your manuscript properly, or connect with a writer's group that has the same interest you ahve. "The Writer's Digest Guide to Manuscript Formats" is one book that might be useful to you (there's a used copy available for $1.50 on Amazon.com right now). If you're interesting in turning your storyboard into a graphic novel, you might want to go over to [Sic Ink](http://p081.ezboard.com/bsicink) where there is a lot of interest in that topic. good luck! Keep us posted on your progress. :)