wrapping the hood would be easiest and best in my opinion..
if you wanted a scoop..
i do like the gt500 idea.. been toying around with the idea for my next focus..
if done properly, it does look exceedingly amazing.. and helps reduce heat drastically.
Tha Kraken: http://www.focusfanatics.com/forum/ford-focus-builds-general-showroom/285082-meet-kraken.html