Help Multi-screen wallpaper

[bl4ke360]

I can't figure out how to make my wallpaper multiscreen, and apparently some people here say you can when you use go launcher. Well I have go launcher and still can't figure it out. The only wallpaper that will work with multiscreen is the one that's listed under "go wallpaper". If I use one from my gallery it won't work with multiscreen. Can somebody tell me how I'm supposed to do it?