Wubi problem: Grub does not find the kernel, even after updating in Ubuntu

["Roel Müller"]

After running the update manager on my Wubi / Ubuntu 9.10, running on an ASUS notebook (Z53H) grub failed to find the proper kernel.

Following this piece of documentation: https://help.ubuntu.com/community/Grub2#Command%20Line%20&%20Rescue%20Mode
and some trial and error, I finally managed to boot in Linux again, using:

linux /boot/vmlinuz.-2.6.31-14-generic root=/dev/sda5 loop=/ubuntu/disks/root.disk ro
initrd /boot/initrd.img-2.6.31-14-generic
boot

These are the old versions, as compared to:
initrd.img-2.6.31-20-generic
vmlinuz.-2.6.31-20-generic

These new versions result in a Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(8,5)

I hoped to get around this manual labour by:

sudo bash
update-grub
sync

But unfortunately the trouble remains.
Any advice would be appreciated :)
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