BBCODE help for jwplayer

[ddem1]

So I finally managed to make a working bbcode for use with jwplayer that enables me to put multiple players within a thread.

<script type='text/javascript' src='/jw/swfobject.js'></script>
<div id='{param}'>"Please refresh page for player"</div> 
<script type='text/javascript'>
var s1 = new SWFObject('/jw/player.swf','mpl','480','360','9');
s1.addParam('allowscriptaccess','always');
s1.addParam('allowfullscreen','true');
s1.addParam('flashvars','&file={param}.mp4&image={param}.jpg');
s1.write('{param}');
</script>

However I'm wondering if there's any way to make an additional paramater so I can set the width and height outside the replacement code? So I don't have to make an additional bbcode for different sized videos