[Centos] A Problem : Can NOT install APT or Synaptic for v4.0

[mok at bioxray.dk (Morten Kjeldgaard)]

>>   Install: apt.i386 0:0.5.15cnc6-1.1.centos4 - extras Total download size:
>> 2.1 M Is this ok [y/N]: y Downloading Packages:
>> warning: rpmts_HdrFromFdno: V3 DSA signature: NOKEY, key ID 4fe06303 public
>> key not available for apt-0.5.15cnc6-1.1.centos4.i386.rpm

> Did you import the GPG key? 

The Centos-4.0 key does not work, and the Centos-4.0beta key is nowhere 
to be found :-(

/Morten