Hope this delayed response isn't the reason you miss out on the good weather
Now that you have a "template report" go into your main report, go to insert a sub-report, choose an existing report and then select the "template report" you made earlier.
Repeat for as many times as you need to (12 total I think). Make sure to place each on it's own section in the main report to avod overlapping (e.g. RFa, RFb,Rfc, etc). Do not place these on the detail sections. It will run once per row of your main report data source which can be thousands of times and cause your crystal to just crash.
Now that you have 12 copies of the template report in the main report you can edit each one manually from the main report to alter the select statement per report. Making a change to one inserted copy will not change any of the others (nor the original template).
Make sense?