Get your copy of Bryce 5.5 here.
http://www.download.com/1770-20_4-0....form%3DWindows
I think this may be in the useful links section if not here you go. You ca also download the Bryce presets from here too. Do not download the Bryce 6 application it costs $99. If you want to upgrade then buy the upgrade pack from Daz studio at half the cost. This will get you started with your renders.
Have fun all.