drupal s3 file url from raw node
<p>I'm trying to get an S3 external URL from a raw drupal 7 node.  I know that I need to hand this off to the amazons3 module, but I don't know how to go about doing that, and I can't find any documentation on it.  Right now if I access the file field, there is only an s3 url stored there.  I just need to find a way to convert it to a public s3 url.  Any help or direction is appreciated.  </p>