i just saw your post dude. what you say is quite correct. all i meant was that i export my outline as a rich text file as a single document.
i've done some rooting around and found this: it's a plugin for OO that will export an outline as MMD, and scrivener will import it, keeping the outline structure intact.
i haven't tried it yet, but here's the link:
http://fletcherpenney.net/MultiMarkd...d_OmniOutliner