Old thread, but I ran into issues with my copy so I'm gonna revive it.MOST
copies of X-Men will work, but the version of X-Men in this box set
will sync fine for runtime but not for chapters in the .riff file. Blame it on whoever authored the DVD and decided to add a crapload of extra chapters.
I've tried it with other versions (the original, 1.5, etc) and it works perfectly. Just avoid the version above and you should be fine.