Blu-ray copying

Is there any software available that will copy 50gb blu-ray discs to 25gb discs? I tried DVDFab and although it looks like it should work, it always fails. I have AnyDVD HD but I don’t know what to use to do the ripping/compression/burning. I’m getting frustrated because I bought a burner and cant do anything with it. Of course this is for personal use.

Sure, there is a free program called BD Rebuilder.

Rip the entire movie to the hard drive using the built-in ripper within AnyDVD HD, then use BD Rebuilder to compress to fit your target size.

Here is the guide for setting it up and using it: