and helpfulness.
You prob already have this info in your tutorials, but I am posting it here anyway for those who like to skip to the good parts.
So I was in the Renderosity free stuff section, (another tip) choose "bryce"
from the drop down menu, and there is a ton of free stuff for bryce in there.
I must have downloaded a couple of hundred Mb of stuff and not knowing exactly how to install things, I started extracting things into my bryce 5.5
content folder. Then I noticed that things were not showing up in the program
nor was it working to just try to import the file in question.
The prob was that these were obp. files I do not know exactly what their
purpose is, however I did find out how to install them.
Important for it appears that many of these content downloads are in this
format.
Open up bryce, go to Create, there is a little tiny triangle just to the right,
click that.
This brings you to the object presets. Click on imports, browse to find your
extracted file and open it up.
You should see your new object in a little picture on the objects preset
palette.
Now you can just click the pic and then the checkmark and your on your way.
I hope this helps someone.

P.S. Dont worry the tutorial I found was written for 5.0, and it can be found
here.http://art4all-all4art.com/News/article/sid=23.html