I have Fedora Core 6 linux install
last stepped into choice of Grub boot.
I select;choose Fedora core 6.
I edit kernel / boot / root=LABEL ro vmlinuz-2.6.18-1.2798.fc6xen=/ quite
Afterwards I follow setting of Setup Agent. After me click finish monitor life death and blank, multiply times;

So I try to restart, after booting show prompt command [localhost]: this show only 3 second, just on screen
show HZ ?

Then I try to use boot of CD by type rescue linux and me type chroot / mnt / sysimage

Then I edit file in boot/grub/grub.conf
Timeout=30
#hiddenmenu
kernel / boot / root=LABEL ro vmlinuz-2.6.18-1.2798.fc6xen=/ quite

then I save.
then I try to reboot,but just remain to come up HZ ?

how so that can use my linux?
I which must edit/instal again.
my computer: Sata HD; Memory 512; Proc P4.3.0, Foxconn MB.

Of my friends aid render thanks.