I am running Kubuntu 13.04 on my MacBook Pro (8,2) and I have it set up to boot through Apple's BIOS emulation. I would like to use the Intel instead of the ATI graphics card. This means that I will need to get the system to boot via EFI. I don't want to do a clean install. The furtherest I can get is into grub-efi, but I cannot actually boot the kernel from there.
My partition scheme:
/dev/sda1 = EFI /dev/sda2 = Mac OS /dev/sda3 = root /dev/sda4 = boot /dev/sda5 = home /dev/sda6 = swap
How can I achieve EFI booting on a BIOS booting install without loosing my existing OS installations?