I'm curious why you have to do a temp version of narration, why can't you do it right the first time?
because the graphics are not there. same reason you can't act in a scene if your scene partner is not there. but you can fake it just well enough so that you can play it back and interact with yourself as a second character, just well enough so that you can go back and play the first character again better, which will enable you to go back and play the second character even better. i hope that makes sense