[YabbaDabba]

Just figured out.
It was easier and more obvious than I thought.

<script type="text/javascript" src="external.php?&amp;type=js"></script> 
<script language="" type="text/javascript"> 
<!-- 
for (x = 5; x < 10; x++) 
{ 
document.writeln("<img class=\"inlineimg\" src=\"YOUWEBSITEADDRESS/images/buttons/lastpost.gif\" alt=\"\" border=\"0\" /> <a href=\"showthread.php?t="+threads[x].threadid+"\">"+threads[x].title+"</a> <span class=\"time\">(Posted By : "+threads[x].poster+")</span><hr />"); 
} 
//--> 
</script>

In this example, I skip the 5 newest threads (x=0 to x=4) in case some spammers get started. But I do want just the next 5 threads (x=5 to x<10) in the feed (out of a total of 50 that I have defined in External Data Provider in vB Options).