Yeah, go ahead and boot into 10.04. Don't bother trying to mount the BRD, the tools you need should already be on the live cd. I am 80% sure if you boot into live, open a terminal, and run "sudo grub-install /dev/XXX" where XXX is your hard drive's physical device, probably 'sda'. You can be sure of that by running "sudo fdisk -l" and making sure the partitions look right for sda. Yes, you just want "sda", not the number after it for grub-install. If that doesn't work, well.. I'll post this and start writing that bit..
Re: Couple questions
Don't bother trying to mount the BRD, the tools you need should already be on the live cd.
I am 80% sure if you boot into live, open a terminal, and run "sudo grub-install /dev/XXX" where XXX is your hard drive's physical device, probably 'sda'. You can be sure of that by running "sudo fdisk -l" and making sure the partitions look right for sda. Yes, you just want "sda", not the number after it for grub-install. If that doesn't work, well.. I'll post this and start writing that bit..