Thanks for the advice guys - I'm afraid I'm not sure what you mean by BootInfo report
However I've worked out how to do this by myself after a bit of reverse engineering of the ubuntu install cd which gave the option boot from first HDD which I wanted to recreate.
Here's what I did if anyone out there wants to recreate the same dumb way of getting your machine to boot from the first HDD.
I created two files in bootFromHdd/isolinux
mkdir -p bootFromHdd/isolinux
isolinux.bin (copied from ubuntu install CD)
isolinux.cfg which I created and edited to contain the following text:
I then created a bootable ISO image from these folders with the following cmd (NB must be run from the parent drectory of bootFromHDD)
mkisofs -o bootFromHDD.iso -b isolinux/isolinux.bin -c isolinux/boot.cat -no-emul-boot -boot-load-size 4 -boot-info-table bootFromHDD
I then used Xfburn to burn the iso to CD
reboot and voila.
see http://members.chello.at/bobby100/ILpart1.htm if you want to know what those .cfg lines mean.
Now to hide the grub menu from my Mother in Law I edited
and uncommented / altered the lines:
and then ran
another reboot and the machine booted straight into lubuntu (as far as the end user is concerned)