Thanks James - that solved it.
I found that the /boot in /etc/fstab was commented out, but I checked in 
cfdisk and I definitely did have a boot partition. I uncommented the 
line and mounted it and then edited the menu.lst file on that partition. 
It then worked first time! :-)
Thanks for the help everyone,
Robin
James Ogden wrote:
> 
> 
> 2009/1/5 Robin Wilson <r.t.wilson@??? 
> <mailto:r.t.wilson@rmplc.co.uk>>
> 
>     I'm editing the /boot/grub/menu.lst file. The contents of that file is
>     as below. I've posted the whole file as there is a large commented
>     section called the Automagic Kernels list, which is confusing me a bit.
> 
>     I had a search around and couldn't find any other files that looked like
>     they might be the right one. There was nothing of interest in /etc/grub.
> 
> 
> Do you have a /boot in /etc/fstab?
> 
> If you mount /boot do you get a different menu.lst?
> 
> James
>