I don't think Chirac/De Villepin have any knives left.
Sarkozy quite deftly out-manoevred them in both the Economic Reform process and the Clearstream case.
Neither Chirac nor De Villepin have any support left whatsoever.
Unfortunately, the only pro-Americain (Alain Madelin) stands no chance of getting more than 2% of the vote.
The conservative Philippe Devilliers (Conservative in the American sense) is also in the 2% maximum range.
Given what I know of Sarkozy, at least we can work with him (unlike Chirac with his deGaullian delusions of "French Gloire".
I thought de Villiers was both a conservative and an Atlanticist.
He did well during the referendum campaign on the EU "constitution", but as you say he will probably only garner a couple of percentage points at most.