You can click "submit" button on the top of the screen (click here for a pic) but I tihnk it has to be just plain text. PM a Mississippi database admin to see if they can take the .pdf file somehow.
If you have them in text format that makes manipulation a lot easier.... click the submit button and it will open up the submission engine--just follow the prompts....
Look on the page you would like to send in update information. Click on the link where it says last updated or the history tab and you will see what admin does most of the updates, contact him via PM.