get DVD43 to remove any copy protection on DVD's or Audio CD's
use DVD-Decrypter to rip the DVD to your hard drive
get 1Click DVD copy to burn the DVD after it is ripped to your harddrive. if the DVD move is too large it will automatically compress the movie to fit onto whatever disc you have in the drive whether it be DVD-R or DVD+R or a dual layered DVD. IF you manage to get some Dual Layer'ed blanks cheap it'll allow you to make Perfect Copies of DVD's and sometimes if a DVD movie doesnt have very many feature's to begin with even on a regular single layer it will allow you to make a perfect copy.
good luck and have fun.
Use Taiyo Yuden blank media or Optodisc Super grade (cheaper) for the most reliable burns