====== Squeeze Archive Repository ======
Use the following in your sources.list:

        deb http://archive.debian.org/debian squeeze main
        deb http://archive.debian.org/debian squeeze-lts main

The second line will fail with an "expired" type message, so you also need to add the following in /etc/apt/apt.conf (create it if it doesn't already exist):

        Acquire::Check-Valid-Until false;