I have made 5 different images
AppIconShadow.png
SwitcherIconShadow.png
SwitcherIconShadow`iphone.png
WallpaperIconDockShadow`iphone.png
WallpaperIconDockShadow.png

and have places one of each file in:
/Bundles
/Bundles/com.apple.mobileicons.framework/
/Bundles/com.apple.springboard

and the shadow works for the dock icons but not for the icons on the main SpringBoard (wallpaper)

What am I doing wrong?