Exporting files is a lot slower than writing them to the file through the annotations editor, but it will keep your MS Pro annotations intact. The only downside is the extremely large file size that is generated (which takes awhile to generate). I'm trying to work with the company that makes the PDF library to provide ways to properly compress the image data, but it doesn't seem to be very high on their priority list, so there isn't much I can do I'm afraid.
Mike
Mike