Hey all!
I was just working on some interface coding before I head off to work for the night.
I created placeholder images for Character Stats (the old one we've had forever), inventory and Adventure windows and set up some code so the windows automatically organize themselves to be out of the way on the screen.
The first window you open will appear on the far left of the screen. When you open a second one, it will either pop up just to the right of the first one or it will push the old one to the right and open the new one on the far left, depending on which windows you are opening. When you open up the 3rd one, all of them go to their default positions, as seen in this screenshot:

And here's what happens when I open up any two windows (Inventory and Adventures, for example):

They just pop up on the left side, out of the way.
And just "Adventures":

It comes up on the far left.
I also moved the NPC chat window to the far right, also out of the way, as you can see in the screenshot. This isn't photoshopped this time.

It isn't quite perfect yet (I guess the Adventures window ought to maybe squish over a little more to the left in the second scenario) but it's nice and functional until we know the exact sizes of the final images we'll be using for these windows.