I had a small problem when trying to edit the guild xml file. I had noticed that each time I log in, the default option was set to show online and offline guildie. I wanted to try to set up to online only and I edited the copy of the file in my custom windows.
When I logged in to test, I noticed that my map windows was completely reset : all previous discovered area were blacked out again, and my UI completely messed up until eq2 crash.
I dont know if this issue is due to my messing in the guild file (probably not, since I tried the same thing on another character and it didnt work), but I am still searching for a way to enable guildie online only view.
So lesson of the day in learning eq2 ui mod : Checkbox Activated="false" will crash the ui