Also, a side note for those with large sites:

Even if URI Mapping Manager is not yet completed, if you are handy with Excel you should be able to approximate its function; that is, the automatically make your own URI mappings for your whole site en masse.

Just take the "product_id" field from the "products" category and map it to the "associated_db_id" field in the "ceon_uri_mappings" table. Then, cobble together whatever "uri"s you want from your category and product info. Import into the ceon_uri_mappings SQL table, boom you're done!