I am currently working on a large scale project utilizing alfresco ECM. I am attempting create what I consider a custom metadata type. What I want to be able to do is in the Modify Content Properties screen, I want to be able to generate something similar to a file upload box (Text box and button that does something to populate the text box). I plan on writing the code for the button etc, I just don't know how to integrate it into the existing UI components. Any insight you can provide would be appreciated.