servlet deployment / openorb-1.2.0.jar

[Richard Dallaway]

Anyone know what I'm doing wrong to cause a "Cannot create resource URL. 
Please set the openorb.home property" error?

I've been trying to deploy a serlvet which calls Xindice into Tomcat 
4.0.1.  I thought I'd be able to bundle all the required JARs into the 
web deployment and all would be fine.

My WAR file contains:
META-INF/
META-INF/MANIFEST.MF
WEB-INF/
WEB-INF/lib/
WEB-INF/lib/openorb-1.2.0.jar
WEB-INF/lib/xalan-2.0.1.jar
WEB-INF/lib/xerces-1.4.3.jar
WEB-INF/lib/xindice.jar
WEB-INF/lib/xml-apis-1.0.jar
WEB-INF/lib/xmldb.jar
...along with all my classes and JSPs etc.
When I deploy this and try my servlets out I get:
org.xmldb.api.base.XMLDBException: A connection to the Database instance 
'db' could not be created. Error: Cannot create resource URL. Please set 
the openorb.home property.
	at org.apache.xindice.client.xmldb.DatabaseImpl.init(Unknown Source)
	at org.apache.xindice.client.xmldb.DatabaseImpl.getCollection(Unknown Source)
	at org.xmldb.api.DatabaseManager.getCollection(DatabaseManager.java:194)
	at org.xmldb.api.DatabaseManager.getCollection(DatabaseManager.java:157)
	at 
com.dallaway.books.servlets.XindiceSearchServlet.init(XindiceSearchServlet.java:91)

This exception is thrown from:
        collection = DatabaseManager.getCollection(db); (line 91, above)
To get this error to go away,  I added openorb-1.2.0.jar to Tomcat's 
classpath.  So...that works... but it's not a great way to deploy an app.

Better ways? Clues? Please?
Thanks
Richard