I highly doubt it.
They know the US is going in despite any veto they pull, and they're going to want a say in a post-war Iraq. Additionally, if the US invades without UN approval (which it would), it weakens the UN immensly and ultimately negates this special status France has as veto power. Then France, on the world stage, becomes.... what?
As much as I like thoughtful deliberation about the upcoming war, France is acting purely out of self interest imho... and it's also this self interest which will finally put them on the side of war.