CS5 Custom Component [Inspectable] Metadata Tag file broswer Help

So I’m writing a Component for our artists to use and I need to be able to point at an XML document. I could have them simply write out the path in a string, but I’d like to allow them to navigate to the source file with a file browser if possible …

I’ve looked through much of the documentation for metadata tags and haven’t found anything “reliable”… for instance…
http://livedocs.adobe.com/flex/3/html/help.html?content=metadata_3.html
Lists possible “types” for [Inspectable] metadata, but it doesn’t list nearly all of them…

I’m currently using a type=“Video Content Path” to let them browse to a video file… but I would think that Adobe would also have a type that allowed to browse to any file type, not just a video. I’ve tried a few things, but haven’t found anything that works…

Ideas?
Thanks in advance