Drupal module/KDP 2.x/Remix button

I'm trying to get the remix button to work with KDP 2.1.2.29057 and the current Drupal module.

I've read this page:
http://www.kaltura.org/kdp-apis-about-javascript-integration

But it looks like what I really need is this information:
http://www.kaltura.org/implementing-javascript-handler-open-editor-or-kc...

I can build a listener or adapt the Drupal module, but it looks like I need to know the event name to listen for first. Anyone have any ideas?

I'd be happy to submit the patches necessary to get the Drupal module updated to work with KDP 2.x. once I get this working.