SecureCore Tiano 2.x is fully compliant with UEFI 2.0 and rigidly adheres to requirements set by Intel MPG (EDK1117 with patches and successors). SecureCore Tiano 2.x has been designed to address the following requirements: UEFI Solution: SecureCore Tiano 2.x is the Phoenix solution which addresses the UEFI needs of the market.
I own a Samsung series 9 laptop (NP900X4C) with a Phoenix BIOS, Windows 8.1, and I had to boot to a USB device with Debian.First, I make my USB with a tool supporting UEFI (I use Rufus).Second, in BIOS (access by F2) I set Fast BIOS to Disable (enabling USB Legacy).Third, I reboot via Right Charms menu, Change PC Settings, Update and recovery, Recovery, Advanced Restart, and after restart, Use Device, USB HDD.And my laptop boots from my USB.I try F10 to choose boot device, and changing boot order in BIOS (access by F2), and it works too. As my boot on USB are exceptional, I prefer Windows method.When I don't use USB, I reset Fast BIOS to Enable. It's empiric, but it works.
Hope this helps, even if I'm not sure I understand all of your post (English is not my native language).