I have a XML config file just with one variable,

<?xml version="1.0"?>

<DTSConfiguration>

<DTSConfigurationHeading>

<DTSConfigurationFileInfo GeneratedBy="WARBABANK\parmeshwari.kumar" GeneratedFromPackageName="TestConfig" GeneratedFromPackageID="{28DFF61A-A509-4404-956D-9B2704C55848}" GeneratedDate="9/23/2013 11:02:21 AM"/>

</DTSConfigurationHeading>

<Configuration ConfiguredType="Property" Path="\Package.Variables[User::remotePath].Properties[Value]" ValueType="String">

...