Instead of using the old mini blind slats, hand sew small plastic rings to the places where the slats above have their holes. Thread the mini-blind string through the rings and tie at the bottom ring. OR glue/sew pockets using add'l liner fabric to hide slats. See PureOfFaith.blogspot.com in favorites.
Add lace to your window with cornstarch. Iron your lace and cut to fit. Mix 2 tbsp cornstarch with about an equal amount of cold water, then mix that in about a cup and a half of boiling water. Paint a thick layer on the window pane. Then apply another thick layer on top using random brush strokes being sure to get all the corners. To remove it, you just wash it off with warm water,