Ealswythe, after I have seen your comment and downloaded this model I have added it under User to the "create objects" section where it is now showing! It does work for me but it is not textured though. I should add I am using Bryce 7.1 which is still offered at DAZ 3D for free (limited extended time). Maybe if you upgrade to the latest version it should work for you too. :)

Thank you! I downloaded it, and when I double-click on it, my Bryce 5.5 opens up to a scene of a blue sky and water, but when I click on that, it goes to blank, and I can find your objects. What should I do to find your objects?