O.K. I've made a mistake in thinking. Maybe you already have installed Ubuntu to HD but the bootloader is misconfigured or missing. If so, try to boot from your Ubuntu CD/DVD again and look for the "rescue system" option or similar. It should be possible to reinstall the bootloader.
A second option is to accsess your extisting system by mounting it through the liveCD.
Boot from it, open a terminal. Type as root:
Code:
mkdir/mnt/my_root_partition
mount -t ext3 /dev/your_root_partition /mnt/my_root_partition
cd /mnt/my_root_partition/boot/grub
Use an editor to look/edit your grub.conf. For example:
Code:
vim or joe or emacs menu.lst
My menu.lst looks like this for expl:
Code:
timeout 10
shade 1
viewport 3 2 77 22
splashimage (hd1,4)/boot/grub/psygnosis_cypress.xpm.gz
background 000000
foreground ffffff
default 1
title linux 2.6.17.14-mm-9
kernel (hd1,4)/boot/vmlinuz-2.6.17.14-mm-desktop-9 BOOT_IMAGE=desktop_2.6.17.14-mm-9 root=/dev/sda5 resume=/dev/sda6 resume2=/dev/sda6 mem=2048M vga=769
initrd (hd1,4)/boot/initrd-2.6.17.14-mm-desktop-9.img
title linux 2.6.23.1-1
kernel (hd1,4)/boot/vmlinuz-2.6.23.1-desktop-1 BOOT_IMAGE=desktop_2.6.23.1-1 root=/dev/sda5 resume=/dev/sda6 resume2=/dev/sda6 mem=2048M vga=769
initrd (hd1,4)/boot/initrd-2.6.23.1-desktop-1.img
title freebsd
root (hd1,0)
chainloader +1
title windows
root (hd0,0)
chainloader +1
title floppy
root (fd0)
chainloader +1
title zeta
root (hd0,2)
chainloader +1
title qnx
root (hd0,1)
chainloader +1
hope this helps