What You’ll need
Installation ISOs for Windows 8 x86 and x64 (any edition)
ISO creation / editing software such as UltraISO
Windows 7 Automated Installation Kit (Since Windows 8 Automated Installation Kit is not out yet, you need to try if the
Windows 7 AIK can do it for you and hence try making this on a
Windows 7 PC)
If it does NOT work you will have wait for the
Windows 8 Automated Installation Kit to be released by Microsoft.
How to Create the Intergated ISO:
Using UltraISO, extract the
\SOURCES\INSTALL.WIM files from both the x86 and x64 ISO files. (If you do not have ISO files you can create them from your DVDs)
Rename these INSTALL.WIM files as x86.WIM and x64.WIM
With the Windows 7 AIK installed on your computer run the Deployment Tools Command Prompt
Type the following commands in the Command Prompt window adding any folder destinations as necessary:
IMAGEX /EXPORT x86.WIM 1 INSTALL.WIM “Windows 8 Enterprise x86″
IMAGEX /EXPORT x64.WIM 1 INSTALL.WIM “Windows 8 Enterprise x64″
This will integrate all the contents from the various version WIM files into a single INSTALL.WIM file.
Using UltraISO, copy this new INSTALL.WIM into the SOURCES folder in your Windows 8 x86 ISO file.
From the SOURCES folder delete the file EI.CFG from the same ISO file. Here is the Microsoft Article on these files. If they do NOT exist, then skip this step.
Save the ISO file
This method definitely works for Windows 7 & may NOT work for Windows 8 as the Windows 8 AIK is still not out. If this works, this would just be a hack or a work around. I do not see x86 and x64 Slipstreamed DVDs on my TechNet or Bizspark account also.
So I repeat, it may NOT work for Windows 8 and you might have to wait till Windows 8 AIK is out.