Speaking of going outside the scriptures, I'm trying to understand the RCC's sanctioning of evolutionary theory to include mankind arising from evolutionary processes(with the caveat that God reserves creative authorship of the soul). I am TERRIBLY SORRY if this seems an attempt to hijack(who on earth coud highjack THIS thread), but I am sincerely looking into the CC and want to ask the quorum of Catholic brothers and sisters in the room!
The Pope decided it was okay. that's about it.
I wouldn't worry about hijacking a thread with nearly 10,000 posts that was originally about how Catholics might take offense about a movie that as far as I know isn't even in theaters any more.
I haven't paid much attention to the Church's teachings on evolution vs. creation. I know that they have not dismissed creation. I would check online Catholic sources, including the Catechism.
Here are a few that may interest you:
http://www.catholic.com/library/Adam_Eve_and_Evolution.asp
http://www.catholic-pages.com/dir/evolution.asp
http://www.lifesite.net/ldn/2005/jul/05071104.html
http://catholic.net/RCC/Issues/Pope-and-Evolution/pope-and-evolution.html
It is like you allude: the Catholic teaching is that God is the author of all seen and unseen, and that Adam and Eve are actual not collective or metaphorical parents of man. It is possible to understand the book of Genesis in the sense that the 6 days were periods of indeterminable length, and that evolution was used by God as a method of creation. It is further possible to understand the creation of man as a process that involved evolution so long as the first man and woman in terms of ensoulment are Adam and Eve. It is also possible to read the Genesis traditionally and literally.
My personal opinion is traditional. I think, evolution of species is junk science designed to indoctrinate atheism, and that is does not belong in public schools. Whoever wants his kids to "learn" that junk should pay for it himself.