SQL Report (Subreport in a Table)

I have a main report and a subreport. I created a subreport on the main report and placed the subreport control in the details of a table. The dataset for the table returns back 5 rows (for this example assume that there is a column called ID and has values of 1,2,3,4,5). I changed the visibility property of the subreport control so that ID > 3. It works in that only ID > 3 print subreports, but values < 3 show up as big white empty space. Is there a way to move the reports that have visibility > 3 up on the table???

or is there a way to dynamically print subreports on a main report?

Thanks.