I found that Birdie Prefs didn't work for me. It worked okay when installed and when you sellect the patterns and that and select the okay button. The patterns then appear on the windows okay. Then when i reset and reboot up the patterns seem to go and i am left with the default ones. But when i go back to Birdie prefs and select okay (the patterns seem to be already selected) the patterns reappear, but then disappear when i reboot.
It doesn't matter too much though cos i got Birdie working in the end! :-)