What software do you already have?  If you have Windowblinds or another OD software, you should buy the Object Desktop suite. For only a little more money, you get a lot more software, including DesktopX, IconX, IconPackager, Windowblinds, WindowFX, etc :)
I'm not sure if just the Desktop X software still includes IconX. I know it used to, but not sure it still does.  Nevertheless Object Desktop is the way to go.