Hey Faf - just to note that I was able to change the text for that link when going to button code > text and getting the code - I noticed that there was "click here" text so I made the change there:
<!-- mibew button --><a href="/assistance/client.php?locale=en&style=silver" target="_blank" onclick="if(navigator.userAgent.toLowerCase().indexOf('opera') != -1 && window.event.preventDefault) window.event.preventDefault();this.newWindow = window.open('/assistance/client.php?locale=en&style=silver&url='+escape(document.location.href)+'&referrer='+escape(document.referrer), 'mibew', 'toolbar=0,scrollbars=0,location=0,status=1,menubar=0,width=640,height=480,resizable=1');this.newWindow.focus();this.newWindow.opener=window;return false;">
<img src="http://www.omgrown.org/assistance/images/messengerblue.png" align="left"> For Assistance<br><center>Click Here</center></a><!-- / mibew button -->
This is on my dev site for now,
www.omgrown.org/abanteJust thought to share this in case anyone else needs the info.
All the best
Ron