How do i upgrade from RHEL 5 to RHEL 6 & 7

Trying to upgrade from redhat 5.11 to 6.11 and I can not download preparade assist tool from the local repo i created. Tried to enable other repos but its not working.

Any idea how to migrate Red Hat Enterprise Linux 5 to Red Hat Enterprise Linux 6&.

I also need need assistance with steps for creating a kickstart based on your RHEL 5 machine, that can be used for installing a RHEL 7 machine.