Hi Karin
While it's not an option to have subfolders under statement groups, I'll bet there is a way to accomplish what you want by using the multiple sheets that are available for each financial report. If you take, for example, five individual reports, and copy them over as individual sheets under one report, it would make the statement group design a lot more streamlined.
It depends on your circumstances, you may want to discuss this possibility with your Adagio consultant.
Steve