Is it permissible to pray upon the Prophet, may Allah bless him and grant him peace, in the manner mentioned in the book "Dala'il al-Khayrat"? And is it true that each prayer mentioned in the book has its own special property?

It is not permissible to rely on the book "Dala'il al-Khayrat" due to its possession of Sharia violations, polytheistic phrases, and weak and fabricated hadiths. Caution must be exercised against attributing speech to the Messenger of Allah, peace and blessings be upon him, without verifying its authenticity, for lying about him is not like lying about anyone else. He, peace and blessings be upon him, said: "Whoever lies about me, let him prepare his seat in the Hellfire." The best form of invoking blessings upon the Prophet, peace and blessings be upon him, is that which he taught his companions: "O Allah, bless Muhammad and the family of Muhammad, as You blessed the family of Abraham, You are indeed Praiseworthy, Most Glorious. O Allah, bless Muhammad and the family of Muhammad, as You blessed the family of Abraham, You are indeed Praiseworthy, Most Glorious."