Hi Gianfranco,
thanks for Your notice about Nat v.04 ! As my favourite INS-equipped aircraft, the DF727, is not availaible for the FSX, I tried to add at the CLS 747-200 Your great CIVA-INS. But as I had problems with the FS-Panelstudio, I have made the testflght with the default FSX Learjet at last, as there is a panel.cfg at Your site (also I had to refuel over the atlantic

).
However, I have used Your flightplan and ADEU-Cards vor KJFK-EGLL,
and I can say Nat v.4.0 and CIVA works well also at FSX .

The only thing is, that the flight is very turbulent; sometime there are exessive changes of the windspeed (from 10kts up to 70 kts.)

But this has nothing to do with Natv.4.0 or CIVA. As I read in another forum, it must be a bug of FSX especially over the atlantic.

Ciao !
Dietmar