Wallpaper subsection resolution???

[JasonPurp]

So I had an idea to make a wallpaper with some of my Photoshop work. I know what the wallpaper resolution is, but I DON'T know the resolution to each subsection. As in, when you go to another home screen, the wallpapers slides to another spot.

I am using LauncherPro so I put on only 3 home screens. Please help me out. Thanks