Topic: Customizing XML data source

I read the FAQ on this but I didn't understand where in the javascript to insert the code in the example:

>>To load XML data from a PHP script called get_data.php in the sub->>folder my_data add this code after the FlashObject code line:
>>fo.addVariable("xmlDataPath", "my_data/get_data.php");

I'm trying to build an all-flash site, but when I move the directory of the simpleviewer files and subfolders, flash searches for the xml at the root folder for the main swf.  Is there a way to tell it to search in the same directory as the target swf?