i dont know about profficient but i may be able to help. what do you need?
I just installed WL today. Under settings, you can choose an alternate wallpaper. I'm probably wrong but, I was assuming that this meant you could dispaly a different wallpaper on your lockscreen than you have on your desktop. I checked the box "alternate wallpaper", and chose one from my wallpaper gallery. But, when the lockscreen is displayed, it's still the same wallpaper as my desktop.