CFFEED & Namespace Declaration

I would appreciate some help with generating rss feed for Google Merchant.  I am trying to use cffeed to generate the xml file which I am good with.  The issue is formatting it to google's specifications and their namespace declaration (<g:price></g:rpice>)  how to set a xml structure to include g:  in front of the names?

Here is a sample of googe xml structure:

<?xml version="1.0"?>
<rss version="2.0" 
xmlns:g="http://base.google.com/ns/1.0">
<channel>
<title>The name of your data feed</title>
<link>http://www.example.com</link>
<description>A description of your content</description>
<item>
<title>Red wool sweater</title>
<link> http://www.example.com/item1-info-page.html</link>
<description>Comfortable and soft, this sweater will keep you warm on those cold winter nights.</description>
<g:image_link>http://www.example.com/image1.jpg</g:image_link>
<g:price>25</g:price>
<g:condition>new</g:condition>
<g:id>1a</g:id>
</item>
</channel>
</rss>