Confessio Romano....Catholica: What is this? It is not on the Vatican web site nor can I find it on several search engines. From what you have posted it appears to be some sort of pledge of allegience to the Pope which does not make it authored by the Roman Catholic Pope or necessarily approved by him. Please clarify your source. If the Pope said he has the power to alter scriptures it will be in an official Vatican document.
Your scripture reference to Mark 7 is incomplete and actually starts at verse 7 (and not 5 as you misstated). If you had included verses 5-6 you would see that Jesus was answering an accusation by the Pharisees that his friends were not following Jewish tradition (they were eating some bread and hadn't washed their hands). The catholic catechism is in agreement with the orthodox church on tradition. Your reading that this means that tradition is the same as scripture is not correct. Tradition has been a source of sustaining faith when the scriptures were not available, during times of persecution and when seperated from the body of the church. The Orthodox faith is even stronger than the Romans when it comes to maintaining the traditions and practices of the apostles and first followers of Christ.
And the Brooklyn Tablet is not the voice or the authority of the Holy See.
Pope's claim to infallibility: Now maybe you will get a clue as to how the Orthodox and Roman Catholic churches are NOT the same. But this does not make them 100% damned, the Orthodox have been patiently tolerating this error from the bishop of Rome for hundreds of years. We pray that he will eventually see the light.
Here is a link on Bible timelines and history.
http://netministries.org/bbasics/
Under New Testament click on "origins".
The old testament scriptures have been around longer than Christianity but the new testament writings have been around only as long as Christians which includes the bishops of Rome. They were just as instrumental in deciding what went into the Bible as the Eastern bishops. And your King James was written from the manuscripts that they chose.