I can't believe you didn't understand the bit about getting her out of the well.
Misdirection.
Getting her out of the well had nothing to do with anything, had she not shown the tape to Aidin (sp?) then she still would have died.
Aidin did not show anyone the tape, therefor he died.
Thats why she had her son make the copy, so he wouldn't die.
The whole point was to take you through the story of what happened to her, then realize (when you would have sworn they were about to roll credits) that it, in fact, was NOT the point, the point was there is no way to stop her, nothing can be done, you can only pass the tape on to another and hope that it dies with them.
The reason I am suprised you didn't get it is because, look at the movie, you bounce from thinking the mother was insane, to the father, to the daughter, to the mother, then back to the daughter, they were all about misdirection in that movie. With a good plotline behind it.
Oh and yeah, Naomi Watts is SUCH a hottie, I love her accent
