Hello, Clyde:
I couldn't find the thread discussing your virtual organ excursions, so I'll jump in here.
Have you seen this site:
http://virtualorgan.com ?
It details and has available for download a program called MidiTzer (not a great name, I admit), which is a virtual WurliTzer theatre organ. It uses multiple midi keyboards and soundfounts and it sounds amazing.
I'm playing with it now and having a great time. It's not a liturgical organ, I know, but who can resist The Mighty WurliTzer? The two-manual version is freeware. There is a three-manual, extended version which is donation-ware, requesting a donation to the Society for the Preservation of Theatre Organs. Pretty slick.
Organically yours,
David