How to Carry through a Banner tag

Hi, am looking for a way to carry through an affiliate banner tag within a download link with my flash MC. the initial php script is

<a href=“<?php echo $_SESSION[‘language’]; ?>〈=<?php echo $_SESSION[‘language’]; ?>&banner_tag=<?php echo $_SESSION[‘btag’]; ?>”><img src=“images/download.gif” width=“410” height=“89” border=“0” alt=“Download site” /></a>

I would need to add some variable I guess to the flash?