You will need to reconfigure the plugs that connect to the headlight assembly. You will take apart the connector and just move the pins around in the connector. When I put mine in, I used an ohmmeter to figure out which pin went where. I'm an old electronics guy so this wasn't a big deal. If doing it this way is intimidating to you, let me know and I'll go to my car and make you a wire list.
I would suggest using standard H4 bulbs. The high power ones will not gain alot and will melt the internals of your expensive lights. What makes a great light is the reflector and lense, not the power of the bulb. The Euro lights have much improved reflectors and lenses, so you won't need the high power bulbs.