How to easily update xml file

Hi everyone

I have made a Flash site that uses an XML file to change all the content.
Just like this example http://www.mxer.com/sandbox/xmlconnect/default.asp

Is there a way of updating this xml file in some kinda user friendly way? I would like a client to be able to update the website himself, without him having to touch the xml code.

I was thinking maybe using Excel’s “Visual Basic,” but haven’t a clue how. Can anyone shed some light? or have a link to something that might send me in the right direction.

Thanks a lot! :tb: