Creating UEFI USB Boot stick using rufus option gives errors

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I am trying to install windows 7 from a USB UEFI stick that I tried to create in vain.
I read other posts on creating UEFI USB Boot sticks and found Rufus the most convenient option . However , Rufus won't allow me a choice of GPT method and Fat32. It complains that it needs a UEFI ISO image.

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So I gather , from this that my ISO does not have the typical EFI files. How do I get these files and what files are needed. What I have is a multiboot ISO that lets you choose between 64 and 32 bit versions.
Dir structure is like this 

Drive letter
Boot
EFI 
source64
sources 
etc

Under EFI 

Microsoft --> Boot --> Fonts(d),Bcd (file)

Under Boot 

en-us,fonts,bcd(file),boot.sdi,bootfix.bin,bootsect.exe,etfsboot.com,memtest.exe

Is this is an issue with missing EFI files is there a way I can download them , alternately can I use GRUB BASED EFI Loader to boot dual boot windows 8 and windows 7 on a EFI Laptop. Just to clarify windows 8 is pre-installed.Windows 7 needs to be installed as dual boot option to windows 8 using a UEFI USB stick .

Best Answer

It won’t work because you have a non-official ISO image. You need an unmodified Windows 7 x64 ISO image. Windows 7 x86 aka 32-bit is not UEFI-compatible.

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