Is it possible at all after some panel.cfg tweaking?
To give a short answer with my limited knowledge: No.  :(

The VC and 2D usage (at the same time) is not available in the Civa gauges, so one has to rework them like another dev did on his bird (and his only, being protected stuff).
I remember CS stating that they've tried to write to the Civa guys (remember, this is some "older" freeware, so I actually don't know if there is a real team to write to for example).
The last information was that they didn't get an answer there. So the will from the CS side is there.
So far, I'm really pleased by the optics of that 707 VC dummy (e. g. if the lights come up, looks very nice), but sadly, it stays a dummy and the only mid-term solution to drive Civa INS in that bird is to stay 2D only.

We could do a VC only thing (no easy to operate 2D panel then) as this would be well within the Civa freeware limits, but I haven't tried this very much so far as the 3D model of the VC interferes with the actual optics of the gauges. This 3D alignment is well beyond my knowledge too.
But this 3D VC thing would also mean that you have to switch your viewpoint to "close to INS" to actually operate the units as no 2D popup would work then.
So the 2D version stays the best one to use so far and I'm ok with it.

I've four birds (three from CS) in my hangar now (one was added today hint, hint), using this setup, while another one is the thing from that other dev and with the tweaked gauges.
So I have five Civa driven aircrafts around, all of them nice and fun to fly.  :)