I wrote that you may add these prayers to ones you pray, not that is a substitute for any approved, regular prayers that laymen or priests pray for the dying. I didn't meant that you shouldn't pray those prayers that you posted, they are beautiful.
Maybe you didn't comprehend what I wrote, don't be fast in finding faults in other...
Sorry, I didn't read those prayers before posting, I thought they are different. I was moved by the story about about these prayers.
"There once was a Pope in Rome who was surrounded by many sins. The Lord God struck him with a fatal illness. When he saw that he was dying, he summoned cardinals, bishops, and learned persons and said to them: “My dear friends! What comfort can you give me now that I must die, and when I deserve eternal damnation for my sins?” No one answered him. One of them, a pious curate named John said: “Father, why do you doubt the Mercy of God?” The Pope replied: “What comfort can you give me now that I must die and fear that I’ll be damned for my sins?” John replied: “I’ll read three prayers over you; I hope you’ll be comforted and that you’ll obtain Mercy from God.” The Pope was unable to say more. The curate and all those present knelt and said an Our Father, then the following Prayers:
and after these prayers it's written: "Meanwhile the Pope died. The curate persevered to the hour, then the Pope appeared to him in body and comforted him. His countenance as brilliant as the sun, his clothes as white as snow, he said: “My dear brother! Whereas I was supposed to be a child of damnation, I’ve become a child of happiness. As you recited the first Prayer, many of my sins fell from me as rain from Heaven, and as you recited the second Prayer, I was purified, as a goldsmith purifies gold in a hot fire. I was still further purified as you recited the third Prayer. Then I saw Heaven open and the Lord, Jesus, standing on the Right Hand of God the Father Who said to me: “Come, all thy sins are forgiven thee, you’ll be and remain in the Realm of My Father forever. Amen!”
With these words, my soul separated from my body and the Angels of God led it to Eternal Joy. As the curate heard this, he said: “O Holy Father! I can’t tell these things to anyone, for they won’t believe me.” Then the Pope said: “Truly I tell thee, the Angel of God stands with me and has written the prayers in letters of gold for the consolation of all sinners. If a person had committed all the sins in the world, but that the three Prayers shall have been read (over him) at his end (death), all his sins will be forgiven him, even though his soul was supposed to suffer until the Last Judgment, it will be redeemed (freed).
The person who hears them read, won’t die an unhappy death, nor in whose house they will be read. Therefore, take these prayers and carry them into St. Peter’s Basilica and lay them in the Chapel named the Assumption of Mary, for certain consolation. The person who will be near death, who reads them or hears them read, gains 400 years indulgence for the days he was supposed to suffer in Purgatory because of his guilt. Also, who reads this Prayer or hears it read, the hour of his death shall be revealed to him. Amen!
We don't know how severe or merciful God will be on bishop Williamson, or any of us. Ladislaus wrote some good points.
I have never read this before, I should search more for old prayer books.