Headlight conversion and Paddle shift?

OK i was wondering 2 things. How hard the is the headlight conversion? *putting the 2000+ headlights on the older model NSX* and How come the UK NSX have paddle shift? I havn't herd of the american ones having it.

http://atsearch.autotrader.co.uk/WWW/cars_search.asp?modelexact=1&lid=search_used_cars_full&make=HONDA&model=NSX&variant=&keywords=&min_pr=75&max_pr=&mileage=&agerange=&postcode=sw19+3rq&miles=100&max_records=150&source=0&photo=1&sort=3&ukcarsearch_full=SEARCH