Can someone please give me some pointers how to install apt-get? I am running v6.0
apt-get is mostly for Debian. There are reliability problems with the RedHat/Mandriva port. Don't go there.
Use yum instead (*). It's included in the 7.0beta base install. You'll also find HOWTOs here for installing yum on 6.0. Keep looking or asking.
(*) But be very careful. It's easy enough to break a 6.0 system by updating from the wrong repositories.