I have the retail version of Vista 64 Ultimate SP1. I get the same "Select CD-ROM Boot Type" screen. I can't even enter the 1 or 2 on the keyboard. It's like the keyboard is disabled or turned off. I connected a USB keyboard and I was able to enter 1 but when I hit enter, it does nothing. I have Macbook Pro Core 2 Duo.
This may explain why the academic version of Windows Vista Ultimate 64 bit Operating System Upgrade Student Faculty Staff License and DVD Set ONLY FOR 64-BIT COMPUTERS that I had purchased through my university is on a DVD-R. I was able to boot from the DVD and I was able to do a clean install on my Macbook Pro perfectly, but the Boot Camp 2.1 for Windows Vista 64 drivers wouldn't install. Then, I surfed around and found that Boot Camp won't install on an upgrade. So, I decided to spend some more money and I ordered the retail version thinking the boot camp drivers would install on the retail Vista. I would have never assumed that the retail wouldn't boot at all.
Why have a 64 bit processor if it can't be utilized? What a waste!