I'd strongly recommend splitting out the summaries from the documents at the source. CMOD doesn't allow for slicing-and-dicing reports, or hiding data -- it's an archive tool, and obscuring data inside the stream (by omitting pages from being indexed) brings into question the fidelity of the archive -- something your legal team won't like.
If that doesn't work, try to find a way to index the summaries as separate documents, and give them a different value - like 's' for summary, and then use query restrictions to eliminate them from search results.
-JD.