As I'm sure you know, the mastering procedure for theatrical is certainly different than for broadcast. The basic mix, the equalizing, the dolby surround, number of tracks, frame rate conversion etc etc etc.
Common wisdom says u cant touch this in an edit suite situation, whatever gear you have but rather only in a cinema sized room with video projection and all the mixing desk bells and whistles to make it perfect. You also need an operator with many years of experience to get it right.
As the man says above, far better and way, way, way far cheaper to omf your audio out and take that to the pros for your theatrical mix. Frees you up to sit back comfortably, enjoy the ride and supervise creatively.
Best,
Clay