I'm moving on with Poser 6. The plug in that I'm currently writing will be designed for it. Where the functionality does not exist in earlier versions I will be making a reasonable attempt to create a work around. If this is not possible without a lot of extra work you'll simply get a message indicating that the feature is not supported in earlier versions. Generally this will be no big deal, input message boxes etc, but things like auto creating full body morphs can only be handled in Poser 6.