Does anyone know how to unload a XML file in Flash?

Does anyone know how to unload a XML file in Flash?

I’m creating a Flash gallery based on one at http://www.kirupa.com/forum/showthread.php?t=87388 … the one that uses XML. The problem is I need to show several galleries and each gallery has its own XML file with an image list. It seems that I can’t make Flash to ‘unload’ XML or overwrite the new XML onto the one already loaded! Is there anyway around it ?:huh: