You can find the letter from Iran president Ahmadi-Najad to USA president George W. Bush in an appendix. I have not yet found time to translatte it into French.
Meanwhile, the French visitors to this blog cannot find a material better than the following comment by brother Bernard L. from Brittany in explanation of the letter:

Photo : Khamenei.ir (Wikimedia)

“[…] Just as that man (the Iranian president) says to another man (the American president) :
“In the charter of media, the correct circulation of news as well as the fair report of events are necessary principles. If we let the truth be lost, how can this be reconciled with the [moral and spiritual] values once preached by Jesus Christ?
“Thank you, brother michel, for rehabilitating every man in his or her prophetic nature.
“[Through his letter Ahmadi-Najad] speaks to “the people of the book”, [which is what the Quran calls Jews, Christians and Muslims,] all of them spurred on by a single word, just as a prophet speaks and put them all at the same level. He himself addresses all of us, even if he himself has reached a high level and is having special relationship [with the world] nowadays.
“Let’s not censor, let’s not temper with the “message” of a man as we keep doing with a lot of messages. Let’s raise it to the level of the Word, which it is intended to help achieve (Sign 35/5-6).
“I am grateful to you, because you let us know this message purified of all the distortions, that the media everywhere on earth have subjected it to. Let’s become media ourselves, media of the light and of goodness. Let’s speak on behalf of the truth and good, let’s speak with strength and self-confidence.
“In the name of the Father thank you for this piece of information. Let’s convey it!”

As it suspects Iran of making a nuclear bomb, which may be just a pretext like the “weapons of mass destruction” that legitimized the attack against Iraq, the USA has demonized Ahmadi-Najad for a while. On the other hand, it seems altogether implausible that a pious Muslim uses the Quran as an excuse to have a go at a diplomatic arrangement. Ahmadi-Najad’s letter does not sort out the problem between Iran and the USA, but it opens that man’s heart in front of our eyes. Perhaps George W. Bush is going to open his own heart by his reply. What is at stake is of paramount importance. A world war may be at stake.
It’s by no means to no purpose that The Sign recommends, You (Christian man) shall ally yourself fraternally with the synagogues’ assemblies (Jews) and with the assemblies of those who submit to God (Muslims) (35/11). The Father was aware, in 1974 when he gave the world this Word, that the situation would appear to be dangerously tense between Christians and Muslims some thirty years later.