The UIBuilder is a freaking headache, I don't blame people for not wanting to use it to create better interfaces. There is a ton of stuff that's hardcoded and can't be changed at all, or breaks other stuff. When I was trying to figure it out to make my own pieces, half the time stuff worked right in the UI Builder but didn't work at all in the game. Blegh.

I hope you can get it going, though. Then you can make the uber EQ2 boxing bits for all of us