You can use DVD Decrypter or AnyDVD to bypass this protection(Sony ArCoSS). There are also other programs that will rip these movies, but these seem to be the most used. Run a search on ArCoSS for more info.
@SAHughes If u look at the guides for both DVD Decrypter and DVD Shrink it will take u through the proccess step by step Look at the bottom of my sig for the guides for both programs.