Google Checkout Callback

I have integrated Google Checkout into my site. It is powered by Joomla and VirtueMart and the XML is being sent to google just fine. When Google sends back the XML it is not being entered into my database. Basically what I need it to do is extract the XML and put it into MySQL Database (probably using PHP). This shouldn't require very many lines of code but I don't know how to do it and don't have the time to learn. An example is take the line of xml "<country>US</country>" and insert it into the "country" column of the "jos_vm_order_user_info" table in MySQL. I attached one of the XML files that Google sent me while I was testing in [login to view URL] Also, the notification API is extremely well documented here [login to view URL] Thank You, Jared Carter P.S. Our budget for this task is estimated at $50-$100 but we might need further integration and will offer more funding if you perform well. Thanks again for your consideration!