http://www.eqinterface.com
best way to make a custom UI work with EQEMU is to make your own....
xml is pretty easy with a little common sense, best thing to do is take it one window at a time and you can get the exact thing you need or want... like having the most screen space with the most useful info for you to know, and being able to get to your inventory and clickies fast... seeing all your stats and exp bars etc etc etc.....
to change the look(skin) of the interface heres some files you will need to replace....windowspiecesXX.tga(XX represents a #) windowbg_XX.tga(XX representing light and dark). Then add your windows....be wary that windows can stand alone and not require additional editing of EQUIAnimations.xml... you can edit that if you want but if you dont know much about it its a hard thing. Experiment and doodle with this a little bit. When EQ crashes open your "UIErrors.txt" file and it will tell you the issue of the problem. try to use text editors with numbered lines so you can fix these errors.
PM if you need help i will try my best to help.