check out DVDbackup from: http://www.wormintheapple.gr/macdvd/DVDbackup.html
You can use Toast Titanium to burn it after you done
with the backup.
The executable is extremely small - 328 KB for the whole .app
while 58KB for the core.
Anyone knows any other good tools to do the same thing?
I tried Mencoder (comes with Mplayer) but seems some bugs
prevent me to run it correcetly...