Apex launcher allows you to set up scrollable wallpaper but it's complicated. Even if the setting is activated in Apex Launcher, the phone still sizes wallpapers in portrait so there is a black screen when you scroll to the left or right. There is hope though because if you hold down on the homescreen, select wallpapers, then select apex launcher wallpapers, these are formated for a scrollable home screen. The only problem with that is the only options are the wallpapers included with that theme pack. Does anyone know where these are stored so more can be added?