The Snow Leopard’s eyes light up. A couple he has never heard of have sent him an email offering the use of their house in British Columbia. It is another step on a road to the Winter Olympics that has been not so much long and winding as pot-holed and unpaved. The Snow Leopard will be the story of these Vancouver Games. He is Kwame Nkrumah-Acheampong, 35, Ghanaian, a skier and about to break the Olympic mould. And he has done it all by himself.