Yeah, it is some pretty impressive workmanship. But like most such projects, the roofline gives it away -- can't do much about that. And like someone else said here -- NSX is a pretty awesome car without messing with it. Why bother?
Then again, maybe if Honda/Acura actually updated the car every once in a while people wouldn't go to such measures. :-)
Dave
http://www.autiv.com/articles/drive_test_mustang_gt_1.htm