Can someone suggest where I can get the After market NAV installed in either the Northern Virginia or Washington DC area. I went to Crevier BMW and purchased the NAV, but I don't think i'm going to be able to install it my self. They told me it would take about 3-4 hours of installation time. Who do you guys recommend I go to. My BMW dealer here is charging me $95/hr and there not even sure they can do it.