is it bought or downloaded? if it's bought i know that you will have the urpmi.setup
rpm on the disks. if it's downloaded then i would go here
and get that package. run it from the command line urpmi.setup
as root and then choose your mirrors, then make sure you confirm, (or whatever it is, the top button) and then -
urpmi.update -a --wget
urpmi --auto-select --wget
i use the wget since curl is giving me problems.
of you could have the wrong architecture.