FCPX created DVDs are always region free and there is no way to set the region flag with FCPX otherwise.
Region settings in general are a complete waste of time anyway- assuming you’re worried about piracy. Anyone who wants to rip your movie from a DVD can do so in a few seconds with region encoding or not.
Just burn in the name of the festival and that’s as good as you can do. That said, most festival screeners absolutely hate to see window burn ins so don’t be too obnoxious with it if you choose to go that way.
Noah
FCPWORKS – FCPX Workflow
Call Box Training