iso 64+32 how ?

[vthand]

Hello, what is the good way to make one two-tier iso (32 bits + 64 bits) of Windows 8.1?
If I make at first the iso, I cannot modify her(it) any more with wintoolkit, which cannot work any more one install.wim
If I modify at first my 2 iso and what I make then " all-in-one disk creator ", my iso does not work (unable to find d:install.wim).
Has anybody already made it with success?

[alfreire]

Here you have a tutorial http://www.wincert.net/forum/topic/9574-all-in-one-disk-creator/

Regards... ;-)