Can't start Ubuntu after Grub update

I had windows on my machine. Installed Ubuntu using WUBI a few weeks ago. Everything was working great until I accepted a few updates yesterday including "Grub" update. That damaged my windows MBR. So, I recovered that using Windows CD.

Now, my windows comes up fine. However, when I select "Ubuntu" from the boot options, I am presented with Gnu Grub 1.98-1ubuntu6 with the Grub command prompt. Not knowing what to do at that prompt, I following the instructions at

http://ubuntuforums.org/showpost.php?p=10264157&postcount=33

Not knowing my mount points or what device is my H drive (my main hard-drive is partitioned into 6 partitions), I tried the following set of commands at the grub prompt:

insmod ntfs
set root=(hd0, 3) # Your Windows partition. Example: set root=(hd0,1)
loopback (loop0) /ubuntu/disks/root.disk
set root=(loop0)
linux /vmlinuz root=/dev/hd0 loop=/ubuntu/disks/root.disk ro
initrd /initrd.img
boot

I saw a lot of stuff happen and I was brought to "initramfs" prompt. Now, I don't know what to do to start/load Ubuntu.

Please help. Thanks in advance!