i am an absoloute beginner dvd ripping and i want to back up my dvd collection. i was given divx dvd ripper by a friend but it will not allow me to copy anything with copyright. what software do i need to be able to copy my dvds to a single dvdr suitable for dvd player use and divx dvd ripper any good?.(preferably free software as im skint). also, what is the difference between dvd-r and dvd+r? at the moment i have dvd+r but this site seems to mention dvd-r a whole load more.