We've just got back from a trip round Europe in our Omega.
Ours also has Xenon's, so you can't use the usual "beam benders" on the headlamp lenses - but there's a lever at the back of each headlamp (behind the rubber cover) that alters the beam pattern. I can't remember which way you adjust them, but it tells you in the owners handbook (or else someone more knowledgeable than me will be able to point you in the right direction!)
You'll also need a hi-vis vest for each passenger in the car, as well as a warning triangle, incase of a breakdown. Plus a set of spare bulbs.
I'd also give your motor a good check-over too, like checking it's oil and water levels, tyres, brakes, etc etc.
As for insurance - you need to inform your insurers that you're taking the car abroad. Chances are if you're fully comp, that they'll not charge you any extra. They don't tend to send you out an insurance Green Card these days.
You'll need to take your driving licence, V5, MOT Cert, and Insurance Certificate too.
I'd also highly recommend getting the AA's European Breakdown cover for the trip too - I've had to use them a couple of times now, and cannot fault them at all. In fact, the service they provide is 110%! For the sake of 60-odd quid, it's total piece of mind.
Have fun!
