Make sure all the fast boot stuff is turned off: general optimizations, usb, video.
Next hit F10 when it boots and select the windows 8 installer, it should show cd drive and uefi cd drive, select uefi cd drive. Also make sure uefi boot is enabled in BIOS
All boot optimizations were/are disabled.
With UEFI boot enabled, when I hit F10 during boot, I see the boot device selection list, but there are no drives in it, not even the optical drive. I've also tried a 5 second pre-boot HDD delay.