I have read quite a few books on screenwriting (Syd Field et al) and I came across this website today and I think it is a fantastic useful summary (yet quite detailed) about how to structure a feature length film screenplay. I printed it out, a great reference I think, you judge for yourself whether it is useful for you or not:
?url? http://www.screenplaymastery.com/structure.htm?/url?
?:D?Beowulf

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