If you boot holding down ALT, you get should get two Windows
installation options - at least, I did. One is a BIOS+MBR option,
the other an EFI+GPT option (i.e., similar to what OS X uses).
As far as I know, nobody on a Mac has been able to get option
two working.
As a consequence, you're stuck with BIOS emulation.
About Vista SP1:
"Adds support for new UEFI (Unified Extensible Firmware Interface)
industry standard PC firmware for 64-bit systems with functional parity
with legacy BIOS firmware, which allows Windows Vista SP1 to install
to GPT format disks, boot and resume from hibernate using UEFI firmware."
http://technet2.microsoft.com/Windo...f706-401e-abb5-eec42ea0a03e1033.mspx?mfr=true
Sorry to be pedantic but when I hold down the Option key all I get are the two disc options (OSX and Windows). Where do the options you mention appear?
Also, could Apple fix the EFI issue with a firmware update?