I am not sure that Web Designer 7 is the best program for what you are trying to do unless your client want to work in Web Designer as well.

Web Designer is not designed as an HTML editing application. The focus is on intuitive WYSIWYG design.

That said, your client can download a free 30 day trial copy and see if she or he likes it.

If yes then you can set up a template that your client can update and publish without outside help.