captivate external pop up widget

I am new to captivate with flash/actionscript experience. I am looking for ways to create a custome flash widget for captivate that can be used as an external pop up (like  a separate browser window pop up invoked by javascript that can be moved off stage). My solution is to use javascript to invoke a separate html with the widget swf embedded in it and have it communicate back and forth with the captivate main wrapper which in turn will communicate with the captivate swf. This will work, but the solution will not be a widget and a captivate content developer will not be able to customize the widget by importing into captivate the way a regular widget is customized. Any solutions on this? I would also appreciate if anyone has any understanding/links that explain the workflow for running the widget in captivate runtime.