I don't know if you found any dvd ripping software yet, but try dvd shrink pref. version 3.2 and up.
This program gives you the option to burn to a single or dual layer disk, changes region codes and even lets you choose the size of the files. You can edit sound and language formats and it also copies the dvd menu exactly as on the original disk. Movie quality stays excellent even if you go as low as 30%.
I have been using this program for over a year already and won't even think of changing.