XML and Flash...but the other way around

Hello community. I have a little issue here. I have a customer that bought an ecommerce package and now is asking me to make modifications. One of them is to have a menu with submenus. There is a great tutorial from Kirupa’s blog in building this. Here is where the issue starts: He wants to be able to modify the menu (categories and subcatecories). I cannot give him the XML file. He will destroy the menu and call me at 4 am asking me for help.
So I’m trying to create an interface that will display in text fields the info he might want to change, with the option to “add” or “remove” categories and subcategories.

Basically I’m trying to modify my XML file from a flash interface.
Is it possible?

Thanks to everybody.

Dani
Thiez Multimedia
www.thiez.com