CentOS 5.5

This is my input:
cd /mnt
mount

hard drive is on sda5
umount /mnt/disc/sda5
mount /dev/sda5 /mnt/disc/sda5

that made disc (rw)

cd /mnt/disc/sda5
ls -a

. .. lost+found user

When I try to cd/mnt/disc/sda5/etc is says that the directory does not exist.

What I am trying to do is access inittab so that I can change the run level. Any one know how to do that while using a livecd in text mode?