How to develop this site?

Ok, i am making flash web site. Data should be in XML. Beacuse i have Menu system that goes into depth, sometimes even 5 levels. The biggest problem is that i have to make it available for my client so he can change data. But not with some XML editor, but by some HTML form that’s online. So i am still thinking how should i do it. So far i made CMS with PHP and MySQL but depth was usually one level. Don’t know how to go here. Do the same but just organize data somehow and then turn DB data in XML wich would be loaded in flash at the begining. Or just edit XML directly and skip DB? Or use some different approach, not with PHP but some flash remoting(never than that) what would be the best way to do this project? I am open to any suggestion and ready to learn it if it’s useful.

p.s.
I am new here, so Hello to evryone! :slight_smile: