...ahmm... the original post asked: "Can anyone suggest additional films that deal with the movie making industry and the making of movies."
Yes, but at the same time, I could point out that the thread header asks the question: "Any GOOD movies about making movies?"
Also, the I personally wouldn't say that the brief, sanitised look at the inner-workings of the hardcore porn-industry in 8MM qualitied under the description "films that deal with the movie making industry." Just an opinion.