Now I’m aware that this is probably very old news to many of you, but I’m having some difficulties in organizing all the different drafts of ANH. I got intrigued by this now that Peter Mayhew started tweeting photos of his script from 1976. From what I’ve gathered, this version, which is called “The Adventures of Luke Starkiller as taken from the ‘Journal of the Whills’ (saga 1) Star Wars” is the third draft. However according to Wookieepedia the “saga 1” was from the second draft, and the third one was called “episode 1.” I’ve read the Dark Horse Comics adaptation of the “original draft”, but from what I’ve read on the forums there are older, unfinished versions.

So could someone help me clear up just how many versions of the script there has been, including the unfinished versions?
(I’d also appreciate any links to complete scripts as I’d love to read these old versions.)

EDIT: Any links to high-res storyboards would be greatly appreciated as well. I’d especially like to have these in better resolution; https://dl.dropboxusercontent.com/u/20535561/SW ANH storyboards.jpg