Disable HideDuplicates From Report Builder

I have some business analysts (I guess Microsoft would call them Information Workers) using Report Builder to design reports, but also as a querying tool. They often times dump the results of their reports/queries into Excel, do some crunching, and then come back to write a better report.

When the Report Builder builds groups, it inherently turns on the HideDuplicates property / element so that it only displays distinct values on the group by fields. This looks great on a report, but is impractical for Excel, where the data is going to be manipulated by row.

In the .rdl, I found the element "HideDuplicates" http://msdn2.microsoft.com/en-us/library/ms152916.aspx controls this behavior of the report. However, I cannot find any option in Report Builder that would allow an Information Worker (i.e. non-codie), to alter this property. My work around for now is to edit the .rdl manually, creating two versions of the report. Very impractical.

Any ideas or info on how to do this in Report Builder would be much appreciated.