Unfortunately I think I can't help with this problem since it is most likely a Witcher 2- or Redkit related issue and this is something for CD Projekt.
Are you sure you followed these steps http://redkit.cdprojektred.com/index.php?c=download , made a "UserContent" folder in MyDocuments\Witcher2\ and copied the folder "Lykaon" right into UserContent?
Are you sure you followed these steps http://redkit.cdprojektred.com/index.php?c=download , made a "UserContent" folder in MyDocuments\Witcher2\ and copied the folder "Lykaon" right into UserContent?