Including Requests that Spawn Child Requests in Request Sets

We have defined a request set that includes the Bank Statement Loader request.  The Bank Statement Loader request itself spawns child requests.  This isn't a problem in itself.  The problem comes in when the Bank Statement Loader program completes without checking its child processes for completion and the request set continues to execute the next stage.

Is there a way to define a request set such that it will not proceed until all child requests have completed?

Thanks