You can use Poser to create ears and nose as separate meshes by using the grouping tool. Then exporting them into Bryce. You can also do the opposite and create a prop figure without a nose and ears also using the grouping tool. As an alternative, if you exported your Poser figure to 3D Studio or possibly some other 3D package, you can detach the ears and nose or for that matter, any other body part into separate objects and re-import into Bryce for texturing.