I have not worked with OC4J and XAware, here is what I do know:

The Factory is the JNDI factory class and it looks like you would use:

com.evermind.server.ApplicationClientInitialContextFactory

The host is a connection URL which for this factory class the format is as follows:
ormi://server:port/path

The example I saw looked like this:
ormi://flash.cumquat.office:23791/how-to-connect-to-oemsjmsd

The two URL's I took a *very* quick glance at were at:
http://forums.oracle.com/forums/thread.jspa?threadID=370125 http://download.oracle.com/docs/cd/B25221_04/web.1013/b14427/rmi.htm#i1085017

As far as Jar files go, I don't know specifics but I believe you will need the jar file that contains the classes used for the JNDI connection (com.evermind.server.ApplicationClientInitialContextFactory) and possibly the ones used for the JMS connection.

Please let the community know how it goes and what issues you encounter.