An apt.conf for use with apt-ftparchive (in order to create a custom mirror) 

  APT {
    FTPArchive {
      Release {
         Origin "debian-cd";
         Label "youretch";
         Suite "testing";
          Version "0.1";
              Codename "etch";
              Architectures "i386";
              Components "main contrib";
              Description "Your Etch CD Set";
          };
        };
     };