Challenging issue for Java and XML Gurus.Please advise

Question

An extremely tricky and challenging code.
I have been able to add 2 XML documents together
using importNode().
xmlDoc1
<?xml version="1.0" encoding="UTF-8"?>
<i:Interest xmlns:i="common">
<i:Details xsi.type="i:vanilla.details.stock">
  <i:Strategy xsi.type="strategies:call">
     <strategies.Expiry>2009-12-01</strategies.Expiry>
  </i:Strategy>
<i:Ref/>
</i:Details>
</i:Interest>
xmlDoc2
<?xml version="1.0" encoding="UTF-8"?>
<i:Underlying value="KGF">
<common:Currency>GBP</common:Currency>
</i:Underlying>
My Java Code to append them together
NodeList list = xmlDoc2.getChildNodes();
for (int i=0; i< list .getLength(); i++) {
     Element element = (Element)list.item(i);
     Node dup = xmlDoc1.importNode(element, true);
     xmlDoc1.getDocumentElement().appendChild(dup);
Output:
<?xml version="1.0" encoding="UTF-8"?>
<i:Interest xmlns:i="common">
<i:Details xsi.type="i:vanilla.details.stock">
     <strategies.Description>Call</strategies.Description>
     <strategies.Expiry>2009-12-01</strategies.Expiry>
   </i:Strategy>
<i:Ref/>
</i:Details>
<i:Underlying value="KGF">
<common:Currency>GBP</common:Currency>
</i:Underlying>
</i:Interest>     Query:
I would like to add the 2nd XML Document after element <i:Ref> . How to do this? I dont want the 2nd XML doc after <i:details> but before it.
Please help.

Answer 1

Well. You say you want to insert a node as a child of another node, and it needs to be inserted before a certain other child node.
There's an insertBefore() method in the Node interface. Use that.
And if you thought that was a challenging issue then you might as well give up writing DOM code right now.