Dapper upgrade: Couldn't stat source package list cdrom

[Tom Vawter]

I get this at the end of the Dapper upgrade from Breezy:

W: Couldn't stat source package list cdrom://Ubuntu 6.06 _Dapper Drake_
- Release powerpc (20051012) dapper/restricted Packages
(/var/lib/apt/lists/Ubuntu%206.06%20%5fDapper%20Drake%5f%20-%20Release%
20powerpc%20(20051012)_dists_dapper_restricted_binary-powerpc_Packages)
- stat (2 No such file or directory)
W: You may want to run apt-get update to correct these problems

Running sudo apt-get update gives this:

Failed to fetch cdrom:[Ubuntu 6.06 _Dapper Drake_ - Release powerpc
(20051012)]/dists/dapper/main/binary-powerpc/Packages.gz  Please use
apt-cdrom to make this CD-ROM recognized by APT. apt-get update cannot
be used to add new CD-ROMs

I am not sure about using "apt-cdrom".  Can anyone please tell me what I
need to do to finish the upgrade?


Tom Vawter