Strictly speaking, ummm, I can program the music, but a proper Gregorian Chant choir is actually a schola and we ladies would not be included.
Actual statement of a progressive female theology student upon being asked her thoughts on Benedict XVI's election: "Now women will just be candlesticks on the altar!" To avoid being a candlestick this is what I do sometimes when our schola sings. I drop into my best tenor range and sing with them. Ninenot - Cal used to let me rehearse with the guys on Wednesdays, as long as I could sing in their octave he didn't care. It's only when Father is in the choir loft that I have to be careful. ; )