easy.
add a new bb code:
tag:
ZUNE
HTML-CODE:
Code:
<div><div id="zunecard_big" class="zunecard"></div><div><embed type="application/x-shockwave-flash" src="http://zcards.zune.net/xweb/lx/swf/zunecard.swf" style="" id="flashUserCard" name="flashUserCard" bgcolor="#FFF" wmode="opaque" salign="tl" flashvars="baseURL=http%3a%2f%2fzcards.zune.net%2fzcard%2fusercardservice.ashx%3fsrc%3dexternal%26zunetag%3d{param}" height="260" width="548"></div><div></div></div>
and save it. then, just do [ZUNE]username[/zune]