Updating XML

How do you guys go about letting a client update an XML file that gets read from Flash?
What I have done in the past.
I built a litle .swf that displays the XML file in an input text field. But it displays all the nodes. So in order to change it, you just basically copy a node, change the text and image link, then hit a submit button. Then PHP code overwrites the XML file with whatever was in the input textbox.
But what if you have a client that is extemely dumb when it comes to understanding nodes and stuff like that?
So my question I guess is what are some of the pros here doing in situations like this?