Parsing XML loaded from embed statement

I don’t know if I’m using the correctly terminology but I’ve made a movie rater in flash for MySpace. The problem is it doesn’t allow script access. The music players on MySpace load xml files through the embed statment.

Now, I’ve done the same thing using this:

I know how to read xml files in actionscript (variable=moviedata.xml.firstchild.firstchild.nodevalue; ) and all that good stuff. The problem is, I don't know how to read an xml file that has been loaded this way with out the actual load commands being in the swf itself.

Can someone please shed some light on this? I've searched google a million times and posted in many forums. I just don't know enough about this stuff to even know what to ask or search for.