What are you after? DVD to VCD, burnt by a CDRW, or DVD to DVD, burnt by a DVD burner?
The above posted suggestions are excellent for CDRW burning to VCD, however if you're looking to rip and burn DVD to DVD, get yourself a copy of (DVD X COPY) (Express) before its removed from the store shelves, if you have a 4x DVD burner with 4x DVD-R media DVD X Copy Express, will rip the movie and burn it to disk in less than 30Min. It uses compression software, and it will fit up to a 9GB movie on a 4.7GB disk.
<b><font color=purple>Listing your system specs, will greatly aid us, in being able to help you solve your problem.</font color=purple></b>