While it's a little more difficult to work with, don't be intimidated by un-pasted wallpaper. If you follow these four steps, you'll be able to hang un-pasted wallpaper like a pro.
       

1. Lay the strips face down on the table and apply the paste to the top section using a roller or brush.
    
2. Fold the section over on itself, back to the middle.
    
3. Apply paste to the bottom section and fold back to the middle. Be careful not to crease the paper.
    
4. Allow 10 minutes in this folded position for wallpaper to "cure" before continuing.