Drwaing template with multiple sheets

Different size sheets for the same drawing are not allowed by the standard unless it is sheet 1 which may be smaller than the others.

Not sure if you still need help with this or not.  While a template can contain multiple sheets, and these sheets can be different sizes, a template can only refer to a single model during creation.  That means all of the sheets are going to show the same model in the views, BOMs, and dimensions.  There is no way (as far as I know) to create a template, and then have different sheets of this template refer to different models.  The only way to do this is to duplicate the drawing and all of the related models (parts and assemblies) together.  Instead of using this drawing as a "template" (in the Creo sense - new drawing), you are duplicating the entire collection of objects together using the Save-As function in Creo (or Windchill.)