Ok
I've met my wheel builder, and we thought about my solution..
He confirmed that is not possible to cross the valve hole and it is not possible to drill another valve hole as solution, because my rim's holes are already chamfered for a french drilling ( direction's spokes)
I was so confused because at SJSCycle they told me and confirm me that is possible to cross a spoke under the valve hole.. but it isn't ! or i would like to know how they do ..
So i'll opt for this method but i'll have a flange hub side whose the sopkes will not be placed on the embossment : " Build as the markings on the hub on the non-drive side (ex box side) and the other way to the markings on the drive side (sprocket side)"