Good. Declare your emergency, tell the controller (I wonder which one you are going to talk to in some parts of France) of your situation and that you have an instrument rating which you cant use in the aircraft or airspace in which you find yourself and therefore you have no alternative to ask him what to do. Mention while you are about it that there is 1,000 foot of undercast with tops way above the MSA and you were thinking about transitioning from VMC on top to VMC below