The only alternative is to set up multiple schedules, one for each hour the report is supposed to run.  You'll configure these to run weekly and then select the days that they will run (all weekdays).

not sure it applies here as i do not use CMC but rather an add on tool for some scheduled reports using Windows scheduled jobs, but just in case it helps... I add in extra crystal select statement options to compensate for hourly reports taht I only want tro run on certain days. This makes the report return no values so it technically runs but does not get sent out because it has 0 results. weekday(currentdate) in [2,3,4,5,6]