Redirect back to VBO after download

Currently the page sits at the 'Confirm / Cancel' screen after clicking download - ideal behavior would be to return to the VBO page after clicking Confirm and initiating the download.

Barriers to this is that you can't pass a redirect header because of readfile()... I believe most download hub type sites have a backwards approach, so a redirect to the 'download initiated' page is set in the PHP, then a frame or headers on that page are used to start the download. Expected behaviour on drupal would probably be setting a drupal message saying the download is underway, with a link to the file if the download doesn't start automatically.

Thoughts?