He created a complete custom css code around the page to deal with the shades and the rounding and he made his own menu class with background image. This is not default striking coding. And i think it would not be appropriate to the designer of that website to submit without consulting him this kind of information here.
So although we understand how he did this (and it looks great) it is way beyond the scope of this helpdesk to provide this type of custom coding or support.
I guess the best thing todo is to send him a email by his contactform and just ask him.