Exporting media files from a project

Hi,

I have created export controller and calling it from my panel using action script.

Currently I am able to export any active sequence to a particular format using 'exportTimeline' function of premiere(using Action script).

1. Can we export media files in a project, other that the sequences?

2. Can we create a UI for the export controller(export controller.epr which is build from c++)?

3. Is it possible to pass any parameters(strings) to the export controller?

Please suggest.