Forcing subreports to execute in a specific sequence

I have a report with 4 subreports. I would like one of the subreports to query its data after the other three subreports have run. After some testing, it appears that the subreports run in sequence, one at a time, from the subreport positioned closest to the top of the report, then the next one down, and the next, and so on.
The report I want to run last actually HAS to be at the top of the page for what I am doing.
I can't find a setting that would allow me to specify the sequence the subreports are executed. Is there one?
Thank you.
Ken

Hi, Check this:
http://books.google.co.in/books?id=...juzlDA&sa=X&oi=book_result&ct=result&resnum=5
Thank you,
Sandy.