Pope to become Presbyterian?

I see that the Prime Minister is off to Rome. Not in the same way that Tony Blair became a Roman Catholic. No, this is just a little bit of afternoon tea with His Holiness and a possible chat about the world's affairs. But there is a little gift winging its way into the Vatican as well. It is apparently a book containing sermons given by the Rev John Brown, the PM's Prebyterian ministerial father. This should make for good bedtime reading. We are not told what kind they are - fire and brimstone types or just good protestant rhetoric?

The Pope will accept the gift, but I'm curious to know why Gordon Brown picked this. Would he be pleased, surprised or shocked if the pontiff woke up the next day completely transformed as a presbyterian preacher?