Another tagging challenge for Minim

[bbrip]

I have quite a sizable collection of organ music in my collection for which I also like to indicate next to the Artist the instrument that is being played in a certain recording, e.g. the Arp-Schnitger-Organ in St. Jacobi Hamburg or the Cavaillé-Coll-Organ in St. Ouen Rouen etc...

In Twonky I do it the following way:
I treat the "Artist" tag as a "Display-Field-for-the-Control-Point-Only" and use the "AlbumArtist" tag as an "indexTag" equivalent to record the performing organist.

for example for AlbumArtist "van Oosten, Ben" I would have different albums with the Artist-tag filled as follows

Ben van Oosten an der Cavaillé-Coll-Orgel in St. Ouen, Rouen
Ben van Oosten an der Cavaillé Coll-Orgel von Saint-Sermain, Toulouse
Ben van Oosten an der Cavaillé Coll-Orgel von St. Sulpice, Paris

etc...

Now, I m scratching my head as to how I could achieve a similar result in Minim. Of couse I could create an "Instrument" tag and be able to browse by instrument, however, Minim would not parse that Instrument information to the Artist field of the CP for display purposes. And also, one more tag means one more tag to maintain. I just spend hours to get my Conductor and Orchestra tags tidied-up at least 90% (All those different spellings of 'Orchestra dell'Accademia Nazionale de Santa Cecilia di Roma' and similar drove me nuts )

Any hints on the above situation would be much appreciated

bbrip