DownloadIndexAggregator.config

<?xml version="1.0" encoding="utf-8" ?>
<configuration xmlns:patch="http://www.sitecore.net/xmlconfig/">
  <sitecore>
    <pipelines>
      <group groupName="analytics.aggregation">
        <pipelines>
          <interactions>            
            <!-- Custom Download Aggregator -->
            <processor type="YourNamespace.AnalyticsDownloadEventAggregator, YourAssemblyName">
              <param desc="name">DownloadAggregationObservable</param>
            </processor>
            <!-- END Custom Download Aggregator -->         
          </interactions>          
        </pipelines>
      </group>    
      <downloadeventindexable.loadfields>
        <processor type="YourNamespace.DownloadLoadFields, YourAssemblyName" />
      </downloadeventindexable.loadfields>
    </pipelines>
  </sitecore>
</configuration>