Dear Klaus, I attach a compressed .exe where the desired result is. Right click - "Invert panorama".
The idea is to project an equirectangular image on the OUTSIDE of a sphere, as if it were a sphere with a mirror texture that captures the surroundings.
The example shows how navigation (rotation to any part) does not affect the geometry of the image.
Please could you tell me if it is feasible to implement something similar with krpano.
It is an old dream now also requested by another user. It would be a new and very nice feature for krpano. 
Again, thankyou very much!!
Best regards,
Fernando
note: Use ctr/shift keys for zoom