Alright, here you go. https://dl.dropboxusercontent.com/u/25507891/Custom%20Windows.zip
I took a quick look and it seemed to work for the most part. However, as I recall, it requires a few other scripts the way it is set up right now. Those scripts being Blizz-ABS, RMX-OS, and I believe Game_Guy's quest script is required for the quest section of the menu. I haven't personally had problems with the menu in the past, but have been able to easily fix issues I found. If you do not know scripting and won't be able to figure out how to fix any of the potentially minor problems that may arise, this probably isn't the script for you. I've generally speaking moved on from RMXP and will only be able to give limited scripting support.