EFI with MBR

[compaqdrew]

I'm dual-booting with XP, so I need to use the MBR partition table. What do I need to do to get EFI v8 playing well with MBR? I tried the startupfiletool, boot0 and boot1 that ship with EFIv8 but I get a b0 error... even after marking the HFS+ partition active. After reading the readme, I'm not sure that efiv8's boot0/boot1 are even made for MBR.

Anyone know how to get EFIv8 booting from an MBR partition?

--Drew