When installing Windows 8 from a USB to my MacBook Pro 2011 only EFI Boot option shows, there is no normal Windows Boot option

Hello. I want to install Windows 8 on my MacBook Pro 2011 form a USB stick. And when I restart, holding Alt. There only option is EFI Boot, which doesn't work. And there is no usual Windows option. I have tried instaling using an external optical drive, but it doesn't work. And I don't have an internal drive because it has been replaced with a HDD. Please help.