If you have an old version -- delete it first! 3.0 will overwrite all old files as necessary, but it will leave a few behind that are no longer used.<br />

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3.0 comes in two versions: a self-extracting installer that auto-detects your warband directory and a .rar for power users who know what they're doing.<br />

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If you have the installer, just run it and follow the instructions.<br />

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If you have the .rar, extract it into your modules directory.