Commercial endpoint manager - cisco phone xml

How can I add fnc=xml;url=http://192.168.2.8/cisco/services/index_cisco2.php to a button with the endpoint manager on a cisco spa525G2. I would also like to change the xml directory service url with endpoint manager.
Thanks,
Tim

Anyone? Any Ideas?

Look at basefile editor for your template. You will need to add it to the basefile.