Reading around, doing searches, looking at the GIK site, there are no treatments for windows other than putting big pads on them and/or curtains up? My windows are on my front wall, basically making up the front wall, and they have blinds on them. So, they don't act like the plaster walls and ceiling in my cozy 12x12x8 room, with nothing in it save for a listening chair.
But perhaps I'm missing something here. Perhaps some curtains work better than others?