DAZ|Studio Runtime directories can be used in Poser without a problem. DAZ|Studio is designed to be Poser compatible so the Runtime directory uses the same structure as Poser's. DAZ|Studio keeps no DAZ|Studio specific content in the Runtime directory, that is where it keeps Poser content. Poser doesn't duplicate the Runtime, it references it. Point Poser at the directory beneath the Runtime directory, in the case of "C:Program FilesDAZStudioContentRuntime" that would be "C:Program FilesDAZStudioContent". For an external runtime you do the same, eg for "F:RuntimesMilleniumRuntime" you would point Poser at "F:RuntimesMillenium".