I use dvd95copy v1.2 to compress dual layer dvd's. Puts focus on everything else then the movie last. I did jurassic park and everything is great. Menu is full and working. Universal's Movie promotion has no sound and the quility is awful but the movie is great....which after all is the whole point.
I always use this guide: http://www.dvdrhelp.com/forum/userguides/146795.php Also with the use of DVD2one you can keep menu and even all the extra features... Excellent quality..! Used it several times now !