Installing a bootloader in SuSE 12.1

Hi there I have been running 11.4 upgraded to 12.1 which ran reasonably well. Today I went to do a clean install from Live USB and I have a problem. The USB boots and runs fine, and it has installed what looks like a complete OS, however, it hasn't installed the bootloader correctly. I have navigated the /boot partition via the terminal and there is a grub installation on there, however, the BIOS can't boot the drive - I get "Operating System Error" when I try to boot from it, similar to the "invalid disk, please insert system disk" you would get if there was a non-bootable floppy in the drive How do I get the BIOS seeing grub? I guess I need to edit the MBR or something but I have no idea how? I have 12.1 Live KDE on a USB3 flash drive to work from Cheers Jonny

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