Dvd x copy is no longer made
If you can find it, dvd shrink is probably the most used right now.
Also you can burn to single layer dvds using dvdshrink. The program actually allows you to discard any extras that you don't need. Let's say for instance,
You want to get rid of subtitles, alternate audio tracks,etc this will allow you to still have room for your movie. I wish I could provide a link but because of copyright laws you'll have to search around for it.