I think you will have to go through and manually remove anything that was installed. I have read some posts about the same kind of thing and have noticed that uninstalling HoW doesn't uninstall IWD. In fact you can not uninstall IWD with out doing it manually in my experience. I haven't noticed that they have bothered to fix this "bug" either. Of course this could just be a quirk of my machine.
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The line between good and evil is a razor sharp thing. Be careful of misteps,
as you may find yourself spitted upon your own blade.