Once app is downloaded and installed go to open or look for icon in your app drawer.
Click icon and wait for load.
The first image to appear is the first one in the pack.
Bottom displays buttons icons for grid view (left side) and set as wallpaper(right side)
Grid view displays all the wallpapers in pack.
After selecting image will expand with first options again visible on bottom (grid view or set wallpaper)
Exit app by quitting (back button) or home button.
Consider downloading the Complete Wallpaper Pack version on Google Play and get:
*six more wallpapers including adult rated
*YouTube and website tabs
*first to be updated with new wallpapers