Hi there,
Yes i have just gone through your requirements, and i can do this in more friendly GUI so that your admin can have an easy update form after which it reflects on teh main pages of teh web site.
Apart from this i can also give you another feature , that if you admin wants to change a section of content according to time, like till 17th content A has to be displyed and after 17th same place a different content B has to be displayed, also some times the admin wants that the content at a particular corner of the page must vanish from appearing after certain date -------- I can provide these kind of added features to enhance and for easy and quality update of your site.
Pls contact me for more details!
Kindest Regards,
Ramana.