>>ok...i've seen the movie twice, completely overanalyzed it, and i think i can answer your four questions.
1: where did samara come from? well, the doctor on the island said that no one knew for sure, but the common assumption was that samara was adopted by anna morgan and her husband. now, if you're wondering how samara was BORN...i have heard that samara's actual creation is going to be the main subject of the upcoming ring sequel. pretty cool, eh?
2: anna dressed victorian for effect more than anything, i would guess. in the newspaper pictures she is dressed in quite modern clothes...and only in the "scary tape" do we see her in victorian dress. i think either samara herself is a few hundred years old and that the dress reflects her own age...or maybe samara changed anna's appearance strictly for the creation of the video. who knows what kinds of powers she has. vhs tapes aren't the kind of thing i'd associate with ghostly powers in the first place
3: rachel and aidan both have to show the tape to other people, they can't just make a copy...and here's why: one common theme that rachel learns about is that samara "only wanted to be heard." if rachel were to only make a copy of the tape without showing it, samara won't have her "message" spread, and would probably stay angry at rachel and, well, kill her and make her all green with her eyes rolled back in her head and whatnot. not pretty.
4: ah, this was my favorite part. aidan freaks when he finds out rachel "saved" samara. during a lot of rachel's little hunt for the truth, she gradually decides that samara was really a good girl who was misunderstood and killed by her crazy parents. however, she is dead wrong. aidan knows something rachel does not: samara is in no way a good little girl. she is, in fact, purely evil, drove her parents to kill her with no other choice, and also drove them to kill themselves. sounds like a bad kid to me. also, could you really believe samara was a good girl if she kills naive teenagers who watch her video? didn't think so. so, bottom line: samara does not care if rachel "saved" her. had she not copied the video tape, she would have died like all the others. the fact that no one's living happily ever after is what is leading me to believe the sequel will be good.
>>hope i covered your questions sufficiently. if anyone has more questions about this movie...feel free to contact me.
>>oh, and my opinion of this movie? haven't seen the original japanese one or read the book, but i thought this movie/book/whatever was very well written with the brutal twists in the plot [that ending was kick-a$$]...and the director is viciously genius. the sounds, static, camera angles...at times they were the scariest part of the movie, i felt. example: "but rachel, i saw her face..." BAM!!!! [make loud screechy noise and go to scene of katie's body in the closet....hell yeah!] ok that's enough. bye.