Thanks for replying.
I did what you said but unfortunately it did not work, the menu option showed but all that happened was that the screen blanked for 1/2 second and returned to the menu options. I did try changing set root to different obvious variables from (hd1,4) to hd0,4) etc, etc but to no effect. I also tried commenting out the drivemap line but again to no effect.
One clue though. When I run the GParted live boot disc and took the "Local Boot Routines Menu / [first option]. Local Boot" a message displayed showing -
Bypass the SYSLINUX Loader, and use the Boot Loader on your hard disc.
This worked fine.
Is there some way I can do as the message implied within Grub2.
Many thanks again