I don’t know. For some reason I have in my head that Flash movies are only for viewing via web. If you wanted to make some effect in a video, would you render it to flash in AE and then import it back to the PPR as Flash?
Or if you’re making a 10 second intro for putting before a DVD video, would you render the 10 second intro to Flash and then import the Flash to PPR, if you’re making at the end a DVD?