To install map, download to desktop(or wherever you want), then extract the files to your Rise of the Witchking Map folder. You must have Hidden Folders & Files on visible to see Application Data Folder.

XP Path: C:/Documents and Settings/(MainUser)/Application Data/My Rise Of The Witchking Files/Maps

Vista Path: C:/Users/(MainUser)/Application Data/My Rise Of The Witchking Files/Maps

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