Changing app drawer wallpaper in Jelly Bean?
Having the free GO Launcher Ex installed, you can install Go Launcher Jelly Beans Theme, also free, and fully personalize your backgrounds.


  Ultra clean, sharp APP DRAWER with FREE REPLACEABLE backgrounds
  
  
  To change App Drawer background:
  
  Press Menu > Pref > Visual settings > Backgrounds > App Drawer Background > GO Theme background