Booting ssparkly new F12 install, error 13 from grub.

[Gene Heskett]

Greets;

I finally said to hell with it and let F12 install itself on /dev/sdb
with all its defaults.

I was surprised on the reboot when my usual grub menu from
/dev/sda was all that showed up, no mention of an F12 install at all.

So, since I had blown away a centos install to put F12 on /dev/sdb, I
carved up a fresh grub stanza that reads like this and added it to
/dev/sda1/grub/grub.conf:

# grub.conf generated by anaconda
#
# Note that you do not have to rerun grub after making changes to this file
# NOTICE:  You have a /boot partition.  This means that
#          all kernel and initrd paths are relative to /boot/, eg.
#          root (hd0,0)
#          kernel /vmlinuz-version ro root=/dev/sdb3
#          initrd /initrd-version.img
#boot=/dev/sda
default=19
fallback=1
timeout=15
splashimage=(hd0,0)/grub/splash.xpm.gz

[...]

#21 new stanza
title	Fedora 12 (2.6.31.6-162.fc12.x86_64 from dev/sdb)
    root (hd1,0)
    kernel /vmlinuz-2.6.31.6-162.fc12.x86_64 ro root=/dev/mapper/vg_coyote-lv_root  LANG=en_US.UTF-8 SYSFONT=latarcyrheb-sun16 KEYBOARDTYPE=pc KEYTABLE=us rhgb quiet
    initrd /initramfs-2.6.31.6-162.fc12.x86_64.img

which is in fact pasted from the /dev/sdb1/grub/grub.conf except for the
initial "root (hd1,0)" statement.

So it looks as if I might have to 'chainloader +1 ' it instead, so how
do I do that?  I've never done that before.

Also, that /dev/sdb1 partition only mounts as ext4 if that is important.

Thanks.