I just watched the Palm Sunday Mass from St. Peter's Square. The processional was Hymnus ad Christum Regem (Gloria, Laus et Honor). The antiphon was the chant, but the verses were full choir. I ended up listening to it about 3-4 times because I find it stunning. Does anyone know if there is music available for this setting somewhere? Everything from the accompaniment with trumpet to the verses in SATB?

http://www.youtube.com/watch?v=DIiE7p_aYe4&feature=player_embedded