Robert,

> But is it possible to make a "true" read only embedded server
> installation on a CD?

You don't install the embedded server, just use it.
And yes, it's possible to use it the way you want it.

> I mean, all the stuff on one CD (not only
> the database, but the server too).

If it fits. :-))

> Can security.fdb be read only?

You will not use security.fdb using embedded.

Artur