Work Flow Modeler and Cusom Instantiation File

System

I have developed a work flow model using the new WFM visual tool and am working with a custom_instatiation.cfg file to make the work flow forms the way I wanted it to. I have created some global variables in the work flow root properties coinciding with some items in the cfg file. It all works, but now I want to create a custom container to make the form elements look nicer visually. I am not able to retain the values of those form elements now for use in the work flow.

1. Can I do this?
2. How do I reference the global variables. The CFG file is attached.