Thanks for respond Klaus!!
I was trying to select an XML (desktop.xml, tablet.xml, mobile.xml) for include before to embed, so my solution was use a main XML en this use an other include to a PHP (template.php)
This include send a GET vars (desktop, tablet and mobile)
echo '<include url="%SWFPATH%/template.xml.php?desktop=%$device.desktop%&tablet=%$device.tablet%&mobile=%$device.mobile />';
And later with PHP I detect the get vars for include the correct XML!