Thanks, I am thinking to just leave it. Maybe put something outside of a vent to see if its actually releasing fiberglass. What was picked out could have been there for years. In order to replace, it would require drywall to be cut in many places. I want things safe but if there is no concern, then it can wait. As for me doing myself, no way.. I would have no clue what I was doing and would probably make things even worse. It looks like everything is made of ductboard.
Thanks all for the comments, I appreciate the assistance in this.