How can I salvage the walls after painting over wallpaper?
Rent wall-paper steamers to remove the wall paper. Unfortunately, the latex paint will make it harder. You need to find a way to allow the steam to penetrate the latex. Use a scraper to scrape the paint, but not through the paper, so you don't damage the underlying wall surface. I've used rasps, cheese graters, etc. Just be careful you don't damage the walls too much!