> >If that is all you need then just create *role* SYSDBA.
> >(the database must be created under different user).
>
> I am sorry but I don't know how to go about this.

You mean how to create database ? Using Create Database command.
Or how to create role ? Using Create Role command. E.g.

CREATE DATABASE 'd:\db.fdb' USER 'NAMIT' PASSWORD 'x5f4g4r8d5c4';
CREATE ROLE SYSDBA;

Ivan