Nick, I got it. All I have to do is Option-Click each output on the Physical Input object (Click & Ports) and assign them to the respective audio instrument sequentially. I am now ready to write some music. Finally. [:D]

Thanks all for responding. Now if I can just finish this film.

I'm getting ahead of myself. I still have the audio routing issue. Digi's 192 I/O is connected to my main DAW and Apogee's Rosetta 200 connected to my Slave. For now, I have both connected to an analog mixer (Mackie Onyx 1640) so I monitoring is no problem; I mean to say, I can still work while I sus-out this bump in the road.

Any ideas how I can deal with this in an efficient way? I have every kind of connecting cable there is for these machines. Ideally, I'd like to stay digital, and if I can rig up a clever system, all the better.

Thanks for your suggestions.