I have a macro built that may be used in the editor and I need to pass as a parameter essentially a "type" that will be utilized in a choose/when in the XSLT to determine which portion of markup to display.  I've built the Data Type, Departments, and would like a parameter type picker that populates it's options via a Data Type.  Anyone done this and/or can provide how to go about accomplishing this?

To meet the deadline, I created a Media Type called "Option" that contains just one text field called "Value".  With the mediaCurrent parameter type, I've instructed the client to select one of the created options in a specific folder in the Media Gallery till this is figured out.