Thanks for replying. I decided to try my hand at building my own. I've done enough "remodeling" in other Sims games that I thought this would be a breeze. The only problem that I keep running into is that since my house is not completely square I am unable to place windows on 45 degree angle areas. Is this a bug in the game, because I know I can do it in Sims Life Stories. Feedback appreciated. Thanks so much!!
Some windows (and some doors and some curtains, for that matter) include diagonal versions, some don't. You'll just have to experiment with different ones until you find one you want to use which includes a diagonal capability.
Also, when placing doors or windows, make sure that moveobjects is off or else in some instances the doors or window will show fine in Build Mode, but will not show in Live Mode.