Hello bofh28. I took a break from EFI booting and linux related stuff for awhile, but now I am back to try again.
I read up on some documentation about EFI boot loaders here:
Managing EFI Boot Loaders for Linux.
I have a basic understanding of partitions in linux too.
My EFI partition (ESP?) is /dev/sda1. Using the command "mountvol Z: /s" in Windows to see my EFI partition, My bootx64.efi file is located in Z:\EFI\Boot.
Here is my, "setup:"
Windows 7: installed on Hard drive
Ubuntu 12.10: installed on one flash drive
Backtrack 5 R3 Gnome 64 Bit: installed on another flash drive
So where should I copy the EFI folder from the Ubuntu 12.10 iso to? I suppose I would copy it to my ESP partition, overwriting my old bootx64.efi.
However, once copied, there is no grub.cfg or any of the grub .mod files in my ESP partition.
My question is, should i be copying anything over to my Backtrack USB? Because at the moment, when I copy the files over to my /dev/sda1 (EFI) partition and create a grub.cfg in the same folder as bootx64.efi and grubx64.efi, nothing noticable happens when I attempt to boot my BT thumb drive.
I would prefer to have all of my GRUB2 files on my ESP partition. Rob Smith from the site I linked says this is the best way to configure GRUB2.