Well, I figure also that with the narration silenced on this track once Im done, whoever re-narrates it will have lower-volume gaps to speak over just like the original once I merge the current track into it...or whatever track you guys want to use for the narration. (shrug)
Currently, I'm just using the 2.0 stereo as a marker and have it sync'd up to the narration track and am just removing the narrated voice out of it.