You need to make a backup copy of your favourite DVD movie and keep the original quality? Not a problem if the original disk is single-layered, in this case the only thing you have to do is to get a blank DVD-R and make a copy. The difficulty is, most movies are actually recorded on double-layered disks and therefore are impossible to copy to single-layer DVD without loss of quality. The ideal solution here would be to make a full copy on a double-layered DVD-R. But, unfortunately, this solution is only available for those who have relatively new DVD recorders, and if you have an older model it won't be possible for you to create double-layer backup copy. Of course, there is always an option to buy new model of DVD recorder, but why getting a new one if the old one still works?
It will take two additional programs to do so: DVD Shrink (to split the movie on two disks) and DVD Decrypter (this utility allows bypassing copy protection measures and make a full copy of DVD; also this program is able to burn recordable DVDs).