I have  not yet been able to get this to work.  
I tried saving segments.  I have tried just saving the whole film.
I tried Cinepak, microsoft vid 1.  They will take a 2min and it ends up as 00:08 avi that can't be opened by Windows or Movie Maker.
I can render out full frame, but that can get ridiculous fast.  
Any tips?
Thanks,
CptTrips