Simply adjust the shading parameters - crank up ambient, tone down diffuse and specular.
Check out the 3D Earth tutorial at "Video CoPilot". Andrew Kramer explains the shadows and lights very well, as well as giving some extra tips in using the CC Sphere effect.
With your project open and your 3D image visible in the workspace, look tor the "properties group tab" which is one of your group tabs. Select the first icon in the groups tab which is "Scene". In the scene box will be these options:
_ Linerarized Colos _ Shadows
_ Back Face _ Lines
Simply unselect shadows.