My solution is based on Chameleon Bootloader. Really a great piece of software!
After having installed and setup your USB-Stick, you can use it like the original EFI-X™.
And the best thing of all is the very limited HCL (Hardware compatibility list) of EFI-X™. All EFI-X™ users share a very common hardware. So very little adoptions / modifications should be necessary. Mainly sound and graphic related.