Click the triangle next to create if you want to import a model. This will bring up the pbject presets. Just press import, find your model, and click ok. You can also add models you made in bryce to the presets by selecting the model, clicking the triangle, and then click add. More materials, use the same process, only with the triangle next to the "edit" text. With a br4 file, just use file-->open. BR$ files are bryce scene files. Then select the objects you want to use, and add them to the object presets as explained above. Welcome to bryce!