Apparently that script, sincee it has Marcy’s Song, is a newer script than from this interview.

Durkin: I had a scene in the script, I just wrote “Patrick plays a song that wins over Martha,” it was very simple. But I didn’t know what the song was. So a month before shooting I was just searching songs under “Martha,” “Marcy May” or “Marlene” at my computer at home. I have a long playlist of names that matches the title of the movie. So the one I absolutely fell in love with was the Jackson Frank song, “Marlene” and it’s the song in the end credits. So I bought the album and the song before it is called “Marcy’s Song” and I couldn’t believe it. Songs back to back on an album recorded in the ’60s!

Somone posted the script to Martha Marcy May Marlene?! And it’s not a transcript, there are differences to the movie and the copyright date is one year before the movie so I think it’s the real script.