Aircraft fly in the sky,There are many real terrain maps,include Mount McKinley,Mount Rainier,and more.also many aircrat are available for deluxe only,an mp3player with spectrum alylalizer is built in. After register You can download maps at For example: 1,Download mountmckinley.zip.. 2,Unzip mountmckinley.zip to get a file MountMcKinley.tem. 3,Copy MountMcKinley.tem to tem directory,the directory usually looks like C:/P