Reading XML payload from text file

Hello,

I have a text file with XML payload in it. The text file has some header information and then the XML payload. How do I read only the XML payload for processing in PI?

the structure of the text file is something like this..

Header Information

Payload

Sample:

#Datetime: 20140318-09:28:50.129

#MessageID: sample123

#Sender: TEST

#SenderParty: TEST

#ReceiverService:

#ReceiverParty: Test

#Interface: Test123

#InterfaceNamespace: http://test.com

#

<?xml version="1.0" encoding="UTF-8"?>

<Sample ><Header>......

Please advise.

Thank you.

Larry.