So far the singing of the prayers to the Spiritual Master is concerned, there is no limitation on how many times it is sung. But it should be done three times daily, and morning it is required. Yes, you may say this prayer at noon Prasadam if it is possible, and sing again in the evening. And you may sing other prayers as you learn them also.
I am so pleased to hear of the activities of Jadurani and her artist assistants. We require this service, as we require so many pictures. Pictures, books, etc., all we shall sell on world tour with our Sankirtana party. So we require a lot of pictures in stock; and wherever we open our centers, we must have at least Panca-tattva picture, Visnu picture, Sankirtana painting, and Spiritual Master's picture, and Radha Krishna painting—they are all required. Therefore, Krishna has sent so many devotees to work on the painting department, so we have to utilize them fully, so their service is fully utilized for advancing in Krishna Consciousness.
Thanking you once more for your sincere service, and I hope you are well.
Your ever well-wisher,
A.C. Bhaktivedanta Swami
NB So far Advaita is concerned, please do not be too much worried, because Krishna will save him. Krishna has promised to always give all protection to His devotees, so you may rest assured that Krishna will take very good care of him. Please confer my blessings to Advaita, and tell him to keep his faith in Krishna, and not to fear the people imprisoning him. Fear personified cannot remain in the presence of Krishna. And the authorities there are simply like wooden dolls, or puppets, in the Hands of the Dance-Master, Krishna. So there is nothing to fear, simply it is to be considered a botheration, nothing more. Encourage him to chant continuously, and not to notice the activities of the prison-wardens. ACB