Security :: Make Readonly Profile Property Writable On Admin Page?

Is it possible to allow an administrator to write to a readonly profile property by redefining the profile property in a web.config file used for administrators pages?

I have a unique account number which must be assigned to each new user (using the default asp.net membership provider). After reading a couple of articles it seemed it would just be easier to define it as a profile property instead of creating a custom membership provider. When the user makes changes to their profile on a profile page I create, I want the value to be readonly. When an admin views the profile I actually want them to assign the value to the property in their page.