This hack doesn't use the vBulletin censorship system at all, so that would make no difference at all whether it's on or off. To get words filtered or replaced using this hack you must enter each one into the Replacement Variables system. It's a bit of a pain if you have a long list of words, but it is flexible and means that rather than have just asterisks (as with the vB censorship system) you can replace one word with another. For example, m*therf**ker could be replaced by muddyfunster.