I have been building houses in TS3, I still don't PLAY TS3, but I do like Create a Style. And I wanted windows to match a game window so I made some. They are probably out there already somewhere, but I wanted to see if I could make the windows and I have. They are only 60kb each. Pretty good.
I love you! I mean, I love the windows. I love the idea behind them too. Also, IIRC, I saw some window expansions by Mutske on T$R (it is likely they are pay though). I will check through their stuff tomorrow if you would like me to comfirm it.