I have done several core changes lately to gain back some compatibility with l2jserver.
Hopefully there wont be any bad issues of these changes, instead it will be more easy to commit code from l2jserver.
One of the thing I was aiming to gain compability with, was the Siegable halls patch developed by BiggBoss.
http://www.l2jserver.com/forum/viewtopic.php?f=69&t=18838
If someone tries to work with it, I have to notify that I have deleted all siegable halls npcs from the spawnlist,
in an older revision, since back then they didn't work and felt too buggy.