I did that several years ago. I was decorating a bed room for a couple of grandchildren that were living with me at the time. All you do is wipe down the wall so there isn't any dust on it. Place your fabric in a container with liquid starch in it. Squeeze out the excess starch and apply the fabric to the wall. Smooth the fabric as you go so there isn't any air bubbles in it. As the starch dries it will stick to the wall just like wallpaper would. When you get ready to remove it just start at one corner and gently pull and it will come off with out messing up your wall. Them just take a damp cloth and wipe the old starch off the wall. The fabric I put on their wall was on there for 3 or 4 years and it didn't draw bugs or mess up the wall.