Sorry, but I am the wrong person to ask, I am also a Java n00b and I have had no joy in compiling the Java yet, myself..

I am still trying and when and if I get iit done, I will add the instructions and update the hack... The hack works fine if you leave it on the default server settings and world IRC is actually quite a good server and the IRCop's are quite friendly and helpfull.. Aswell as their server taking the load and not yours, another bonus... Less bandwidth and resources you will lose.. You considered staying with them??
For now though if you really dont want to use world IRC, have a go yourself and checkout the following sites for more info on compiling and signing the Eirc applets.
Eirc Homepage:
http://eirc.sourceforge.net/
Eirc Help Page:
http://www.habber.net/index.php?p=eircfaq
PS If you have any joy in compiling/signing please come back and tell me how you did it, I keep getting errors