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Your question is really a question for OSIsoft's regular Tech Support. At vCampus we focus on PI Development, PI Architecture and PI Integration mainly. Questions about the use and configuration of PI Processbook are best directed to Tech Support. You can find the contact method here, or send your question through firstname.lastname@example.org.
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I did post this for Tech support. I was told to copy dataset to a new dataset and rename the new dataset. In my case I have the same dataset name on all the displays as I copied them from the first display with the result that they all have the same name. I cannot change the name for these datasets as they are all greyed out implying they are read only.