How to make a model unprintable

We have dgn files that contain several models.  The default model contains all of the graphics.  Other models are used for printing parts of the default model graphics.  Saved views and references are used to pull appropriate parts from the default model to the other models.  When we print with print organizer we are able to drag in the one dgn file and PO expands it into however many sheets it contains.  This works well with the exception that the default model is also imported into print organizer.  Is there a way to make one or any model un printable in print organizer?  thanks