@Jeff: Thanks for your support!
@Allan: There is in deed no complex help available. But there's a README.txt file in the ZIP that explains installation (basically it's just an unzip) and starting of the programm (call obs.bat (Windows), obs.sh (Unix/Linux) or obs.command (Mac))
I think the programm itself is more or less self explaining. I've a blog at:
http://observationmanager.wordpress.com/
that discusses certain hints and tricks.
Hope this helps...
Best
Dirk