Help! Product Info Short Description Using XML.

[doinfinity]

Dear all,

I read that it can display a separate short description by using XML.
Link: blog.rubikintegration.com/2009/08/06/short-description-for-zencart-a-much-simpler-alternative/

Putting this in the product description:
<?xml version="1.0"?>
<desc>
<shortdesc>something</shortdesc>
<longdesc>something else</longdesc>
</desc>

I would like to know how to parse this xml string and display on the product info page.

I don't familiar with any code, but I read that need to load the xml file or string. How do I achieve it?