I have never been able to get this to work, before today, that is.
WG, I tried your suggestion, and for some reason, it didn't work for me.
I have always preferred to have my docks in the Documents/Stardock/Objectdock folder. Even with having my backgrounds there, as long as i place the +/- images in "C:\Program Files\Stardock\ObjectDock", everything works fine!