Show empty-rows for cross-tab using date/time groups

I'm trying to create a cross-tab that looks like the following:

          X      
-------|-----|
Sun.   |  3  |
-------|-----|
Mon.   |  0  |
-------|-----| 
Tue.   |  1  |
-------|-----|
Wed.   |  2  |
-------|-----|
Thr.   |  0  |
-------|-----|
Fri.   |  1  |
-------|-----|
Sat.   |  4  |
-------|-----|

I've setup my cross tab to have a Date/Time group where the "Day of Week" is selected. When I run the report, the cross tab only shows the rows with data it them (i.e. Mon. and Thr. are omitted).

I know about the "Empty Rows/Columns" setting...but it is grayed out unless I add a higher level date/time grouping (i.e Month) to the cross-tab.

My primary objective is to create a histogram (bar-chart) that shows the values grouped by Day of Week (or hour). If there is an alternate way of accomplishing that (without cross-tabs), I could use that approach.

               *
   *           *
   *     *     *
   *   * *   * * 
  ---------------
   S M T W T F S

FWIW, I also want to build a similar chart with hours 00:00-23:00.

Thanks,
~Michael