Adding a new NTv2 parameter file eg: *.gsb

Hi Folks,

I have some *.gsb files for Geographic coordinate transformation. How do I add these to the library of installed files that appear in Geographic Coordinate Systems> Select Geographic Coordinate System.?

I can find SOME of the installed GSB files in  C:\Program Files\Bentley\MicroStation CONNECT Edition\MicroStation\GeoCoordinateData\UK\ but this area seem incomplete and it appears that various transformations available in the Library don't appear in this area at all.

I did find this suggestion from some years ago but it seems a rather long winded way to go about things. I haven't tried it yet.

https://communities.bentley.com/products/microstation/b/microstation_blog/posts/adding-a-new-grid-shift-override-file-to-microstation-connect

It does suggest that transformation files should be provided to Bentley for inclusion in future releases but this is not helpful when the information is proprietary.

All advice gratefully received,

Thanks,

Neil.