Here is a recording of César Franck's Deuxième Choral.
I used bwoll's settings (http://www.contrebombarde.com/concerthall/music/22365
) and I added a litte bit of reverb in Audacity. All together it sounds very well on the Caen set..!
It was easy to follow Franck's registration suggestions, but for the two quiet parts with the Voix Humaine & tremulant it was more difficult... The modelled HW tremulant does not deliver the desired effect, so I ended up with Voix Céleste, Hautbois and Voix Humaine with tremulant.