GoogleMap snippet - want to add "Get directions" link inside bubble

I’m using the GoogleMap snippet and am trying to find out how to add a "Get directions: To here - From here" link inside the google map bubble. I was wondering if anyone has ever done this before and if they could point me in the right direction.

For a live example go: http://www.massagecenters.com/directions.php

Thanks for any help
~Jules

UPDATE: Since I was unable to resolve the issue with the GoogleMap snippet I looked for an alternative option and ended up using jQuery GPS http://www.birdwingfx.com/jQuery_gps/index.html.